diff --git a/nw/common.py b/nw/common.py
index 17a8a337..d5563d16 100644
--- a/nw/common.py
+++ b/nw/common.py
@@ -152,13 +152,13 @@ def formatInt(theInt):
             theVal /= 1000.0
             if theVal < 1000.0:
                 if theVal < 10.0:
-                    return "%4.2f%s%s" % (theVal, nwUnicode.U_THNSP, pF)
+                    return f"{theVal:4.2f}{nwUnicode.U_THNSP}{pF}"
                 elif theVal < 100.0:
-                    return "%4.1f%s%s" % (theVal, nwUnicode.U_THNSP, pF)
+                    return f"{theVal:4.1f}{nwUnicode.U_THNSP}{pF}"
                 else:
-                    return "%3.0f%s%s" % (theVal, nwUnicode.U_THNSP, pF)
+                    return f"{theVal:3.0f}{nwUnicode.U_THNSP}{pF}"
 
-    return "%d" % theInt
+    return str(theInt)
 
 def formatTimeStamp(theTime, fileSafe=False):
     """Take a number (on the format returned by time.time()) and convert
@@ -169,6 +169,17 @@ def formatTimeStamp(theTime, fileSafe=False):
     else:
         return datetime.fromtimestamp(theTime).strftime(nwConst.tStampFmt)
 
+def formatTime(tS):
+    """Format a time in seconds in HH:MM:SS format or d-HH:MM:SS format
+    if a full day or longer.
+    """
+    if isinstance(tS, int):
+        if tS >= 86400:
+            return f"{tS//86400:d}-{tS%86400//3600:02d}:{tS%3600//60:02d}:{tS%60:02d}"
+        else:
+            return f"{tS//3600:02d}:{tS%3600//60:02d}:{tS%60:02d}"
+    return "ERROR"
+
 def splitVersionNumber(vString):
     """ Splits a version string on the form aa.bb.cc into major, minor
     and patch, and computes an integer value aabbcc.
diff --git a/nw/config.py b/nw/config.py
index bc777812..a82c133b 100644
--- a/nw/config.py
+++ b/nw/config.py
@@ -3,7 +3,7 @@
 
  novelWriter – Config Class
 ============================
- This class reads and store the main preferences of the application
+ Class reading and holding the preferences of the application
 
  File History:
  Created: 2018-09-22 [0.0.1]
@@ -911,7 +911,7 @@ class Config:
     def _packList(self, inData):
         """Pack a list of items into a comma separated string.
         """
-        return ", ".join(str(inVal) for inVal in inData)
+        return ", ".join([str(inVal) for inVal in inData])
 
     def _parseLine(self, cnfParse, cnfSec, cnfName, cnfType, cnfDefault):
         """Parse a line and return the correct datatype.
diff --git a/nw/core/document.py b/nw/core/document.py
index 6b9361d0..d1b4196a 100644
--- a/nw/core/document.py
+++ b/nw/core/document.py
@@ -3,7 +3,7 @@
 
  novelWriter – Project Document
 ================================
- Class holding a document
+ Class holding a single novelWriter document
 
  File History:
  Created: 2018-09-29 [0.0.1]
diff --git a/nw/core/index.py b/nw/core/index.py
index 97ad7ba4..29f80ea9 100644
--- a/nw/core/index.py
+++ b/nw/core/index.py
@@ -3,7 +3,7 @@
 
  novelWriter – Project Index
 =============================
- Class holding the index of tags
+ Class holding the project index of tags, headers and references
 
  File History:
  Created: 2019-05-27 [0.1.4]
diff --git a/nw/core/item.py b/nw/core/item.py
index 944b5f0c..6793af39 100644
--- a/nw/core/item.py
+++ b/nw/core/item.py
@@ -29,7 +29,7 @@ import logging
 
 from lxml import etree
 
-from nw.common import checkInt
+from nw.common import checkInt, isHandle
 from nw.constants import nwItemType, nwItemClass, nwItemLayout
 
 logger = logging.getLogger(__name__)
@@ -104,27 +104,37 @@ class NWItem():
         if "parent" in xItem.attrib:
             self.itemParent = xItem.attrib["parent"]
 
-        setMap = {
-            "name"      : self.setName,
-            "order"     : self.setOrder,
-            "type"      : self.setType,
-            "class"     : self.setClass,
-            "layout"    : self.setLayout,
-            "status"    : self.setStatus,
-            "expanded"  : self.setExpanded,
-            "exported"  : self.setExported,
-            "charCount" : self.setCharCount,
-            "wordCount" : self.setWordCount,
-            "paraCount" : self.setParaCount,
-            "cursorPos" : self.setCursorPos,
-        }
+        retStatus = True
         for xValue in xItem:
-            if xValue.tag in setMap:
-                setMap[xValue.tag](xValue.text)
+            if xValue.tag == "name":
+                self.setName(xValue.text)
+            elif xValue.tag == "order":
+                self.setOrder(xValue.text)
+            elif xValue.tag == "type":
+                self.setType(xValue.text)
+            elif xValue.tag == "class":
+                self.setClass(xValue.text)
+            elif xValue.tag == "layout":
+                self.setLayout(xValue.text)
+            elif xValue.tag == "status":
+                self.setStatus(xValue.text)
+            elif xValue.tag == "expanded":
+                self.setExpanded(xValue.text)
+            elif xValue.tag == "exported":
+                self.setExported(xValue.text)
+            elif xValue.tag == "charCount":
+                self.setCharCount(xValue.text)
+            elif xValue.tag == "wordCount":
+                self.setWordCount(xValue.text)
+            elif xValue.tag == "paraCount":
+                self.setParaCount(xValue.text)
+            elif xValue.tag == "cursorPos":
+                self.setCursorPos(xValue.text)
             else:
                 logger.error("Unknown tag '%s'" % xValue.tag)
+                retStatus = False
 
-        return True
+        return retStatus
 
     @staticmethod
     def _subPack(xParent, name, attrib=None, text=None, none=True):
@@ -153,7 +163,7 @@ class NWItem():
         """Set the item handle, and ensure it is valid.
         """
         if isinstance(theHandle, str):
-            if len(theHandle) == 13:
+            if isHandle(theHandle):
                 self.itemHandle = theHandle
             else:
                 self.itemHandle = None
@@ -167,7 +177,7 @@ class NWItem():
         if theParent is None:
             self.itemParent = None
         elif isinstance(theParent, str):
-            if len(theParent) == 13:
+            if isHandle(theParent):
                 self.itemParent = theParent
             else:
                 self.itemParent = None
diff --git a/nw/core/spellcheck.py b/nw/core/spellcheck.py
index e3093070..7223c616 100644
--- a/nw/core/spellcheck.py
+++ b/nw/core/spellcheck.py
@@ -3,7 +3,7 @@
 
  novelWriter – Spell Check Classes
 ===================================
- Wrapper class for spell checking
+ Wrapper class for spell checking tools
 
  File History:
  Created: 2019-06-11 [0.1.5]
diff --git a/nw/core/status.py b/nw/core/status.py
index a2e5b92a..7a1c7127 100644
--- a/nw/core/status.py
+++ b/nw/core/status.py
@@ -3,7 +3,7 @@
 
  novelWriter – Project Item Status Class
 =========================================
- Class holding the status elements of a project item
+ Class holding the status/importance elements of a project item
 
  File History:
  Created: 2019-05-19 [0.1.3]
diff --git a/nw/core/tokenizer.py b/nw/core/tokenizer.py
index 5087c67c..c7b23208 100644
--- a/nw/core/tokenizer.py
+++ b/nw/core/tokenizer.py
@@ -3,7 +3,7 @@
 
  novelWriter – Text Tokenizer
 ==============================
- Splits a piece of nW markdown text into its elements
+ Splits a piece of novelWriter markdown text into its elements
 
  File History:
  Created: 2019-05-05 [0.0.1]
diff --git a/nw/core/tree.py b/nw/core/tree.py
index f33b0d59..fc908745 100644
--- a/nw/core/tree.py
+++ b/nw/core/tree.py
@@ -3,7 +3,7 @@
 
  novelWriter – Project Tree Class
 ==================================
- Class holding the data of the project tree
+ Class holding the project's tree of project items
 
  File History:
  Created: 2020-05-07 [0.4.5]
diff --git a/nw/gui/about.py b/nw/gui/about.py
index 248cf7d1..7f00cf11 100644
--- a/nw/gui/about.py
+++ b/nw/gui/about.py
@@ -55,14 +55,14 @@ class GuiAbout(QDialog):
         self.innerBox = QHBoxLayout()
         self.innerBox.setSpacing(self.mainConf.pxInt(16))
 
-        self.setWindowTitle("About %s" % self.mainConf.appName)
+        self.setWindowTitle("About novelWriter")
         self.setMinimumWidth(self.mainConf.pxInt(650))
         self.setMinimumHeight(self.mainConf.pxInt(600))
 
         nPx = self.mainConf.pxInt(96)
         self.nwIcon = QLabel()
         self.nwIcon.setPixmap(self.theParent.theTheme.getPixmap("novelwriter", (nPx, nPx)))
-        self.lblName = QLabel("<b>%s</b>" % self.mainConf.appName)
+        self.lblName = QLabel("<b>novelWriter</b>")
         self.lblVers = QLabel("v%s" % nw.__version__)
         self.lblDate = QLabel(datetime.strptime(nw.__date__, "%Y-%m-%d").strftime("%x"))
 
@@ -115,17 +115,17 @@ class GuiAbout(QDialog):
         """
         listPrefix = "&nbsp;&nbsp;&bull;&nbsp;&nbsp;"
         aboutMsg   = (
-            "<h2>About {name:s}</h2>"
+            "<h2>About novelWriter</h2>"
             "<p>{copyright:s}.</p>"
             "<p>Website: <a href='{website:s}'>{domain:s}</a></p>"
-            "<p>{name:s} is a markdown-like text editor designed for "
+            "<p>novelWriter is a markdown-like text editor designed for "
             "organising and writing novels. It is written in Python 3 with a "
             "Qt5 GUI, using PyQt5.</p>"
-            "<p>{name:s} is free software: you can redistribute it and/or "
+            "<p>novelWriter is free software: you can redistribute it and/or "
             "modify it under the terms of the GNU General Public License as "
             "published by the Free Software Foundation, either version 3 of "
             "the License, or (at your option) any later version.</p>"
-            "<p>{name:s} is distributed in the hope that it will be useful, "
+            "<p>novelWriter is distributed in the hope that it will be useful, "
             "but WITHOUT ANY WARRANTY; without even the implied warranty of "
             "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.</p>"
             "<p>See the License tab for the full text, or visit  the GNU website "
@@ -134,7 +134,6 @@ class GuiAbout(QDialog):
             "<h3>Credits</h3>"
             "<p>{credits:s}</p>"
         ).format(
-            name      = self.mainConf.appName,
             copyright = nw.__copyright__,
             website   = nw.__url__,
             domain    = nw.__domain__,
diff --git a/nw/gui/build.py b/nw/gui/build.py
index 45a1a073..4a8f8aad 100644
--- a/nw/gui/build.py
+++ b/nw/gui/build.py
@@ -1,9 +1,9 @@
 # -*- coding: utf-8 -*-
-"""novelWriter GUI Build Novel
+"""novelWriter GUI Build Novel Project
 
- novelWriter – GUI Build Novel
-===============================
- Class holding the build novel window
+ novelWriter – GUI Build Novel Project
+=======================================
+ Class holding the build novel project dialog
 
  File History:
  Created: 2020-05-09 [0.5]
@@ -391,11 +391,11 @@ class GuiBuildNovel(QDialog):
         self.savePDF.triggered.connect(lambda: self._saveDocument(self.FMT_PDF))
         self.saveMenu.addAction(self.savePDF)
 
-        self.saveHTM = QAction("%s HTML (.htm)" % self.mainConf.appName, self)
+        self.saveHTM = QAction("novelWriter HTML (.htm)", self)
         self.saveHTM.triggered.connect(lambda: self._saveDocument(self.FMT_HTM))
         self.saveMenu.addAction(self.saveHTM)
 
-        self.saveNWD = QAction("%s Markdown (.nwd)" % self.mainConf.appName, self)
+        self.saveNWD = QAction("novelWriter Markdown (.nwd)", self)
         self.saveNWD.triggered.connect(lambda: self._saveDocument(self.FMT_NWD))
         self.saveMenu.addAction(self.saveNWD)
 
@@ -408,11 +408,11 @@ class GuiBuildNovel(QDialog):
         self.saveTXT.triggered.connect(lambda: self._saveDocument(self.FMT_TXT))
         self.saveMenu.addAction(self.saveTXT)
 
-        self.saveJsonH = QAction("JSON + %s HTML (.json)" % self.mainConf.appName, self)
+        self.saveJsonH = QAction("JSON + novelWriter HTML (.json)", self)
         self.saveJsonH.triggered.connect(lambda: self._saveDocument(self.FMT_JSON_H))
         self.saveMenu.addAction(self.saveJsonH)
 
-        self.saveJsonM = QAction("JSON + %s Markdown (.json)" % self.mainConf.appName, self)
+        self.saveJsonM = QAction("JSON + novelWriters Markdown (.json)", self)
         self.saveJsonM.triggered.connect(lambda: self._saveDocument(self.FMT_JSON_M))
         self.saveMenu.addAction(self.saveJsonM)
 
diff --git a/nw/gui/doceditor.py b/nw/gui/doceditor.py
index 9a2cb683..a24a1f4e 100644
--- a/nw/gui/doceditor.py
+++ b/nw/gui/doceditor.py
@@ -3,7 +3,7 @@
 
  novelWriter – GUI Document Editor
 ===================================
- Class holding the document editor
+ Class holding the main document editor
 
  File History:
  Created:   2018-09-29 [0.0.1]  GuiDocEditor
diff --git a/nw/gui/dochighlight.py b/nw/gui/dochighlight.py
index cc11ef86..309b74a8 100644
--- a/nw/gui/dochighlight.py
+++ b/nw/gui/dochighlight.py
@@ -3,7 +3,7 @@
 
  novelWriter – GUI Document Highlighter
 ========================================
- Syntax highlighting for MarkDown
+ Subclass for the main editor syntax highlighting
 
  File History:
  Created: 2019-04-06 [0.0.1]
diff --git a/nw/gui/docmerge.py b/nw/gui/docmerge.py
index d7d128fe..f2a49e19 100644
--- a/nw/gui/docmerge.py
+++ b/nw/gui/docmerge.py
@@ -3,7 +3,7 @@
 
  novelWriter – GUI Doc Merge
 =============================
- Tool for merging multiple documents to one
+ Tool for merging multiple documents to one document
 
  File History:
  Created: 2020-01-23 [0.4.3]
diff --git a/nw/gui/docviewer.py b/nw/gui/docviewer.py
index 0c9a8086..636c4637 100644
--- a/nw/gui/docviewer.py
+++ b/nw/gui/docviewer.py
@@ -3,7 +3,7 @@
 
  novelWriter – GUI Document Viewer
 ===================================
- Class holding the document html viewer
+ Class holding the main document viewer
 
  File History:
  Created: 2019-05-10 [0.0.1] GuiDocViewer
diff --git a/nw/gui/itemdetails.py b/nw/gui/itemdetails.py
index 6d5cbcb5..da1a8f4a 100644
--- a/nw/gui/itemdetails.py
+++ b/nw/gui/itemdetails.py
@@ -3,7 +3,7 @@
 
  novelWriter – GUI Document Details
 ====================================
- Class holding the left side document details panel
+ Class holding the project tree item details panel
 
  File History:
  Created: 2019-04-24 [0.0.1]
diff --git a/nw/gui/itemeditor.py b/nw/gui/itemeditor.py
index 95a68c82..a56a93bf 100644
--- a/nw/gui/itemeditor.py
+++ b/nw/gui/itemeditor.py
@@ -3,7 +3,7 @@
 
  novelWriter – GUI Item Editor
 ===============================
- Class holding the item editor
+ Class holding the item editor dialog
 
  File History:
  Created: 2019-04-27 [0.0.1]
diff --git a/nw/gui/mainmenu.py b/nw/gui/mainmenu.py
index 6bb7edf1..706b5bba 100644
--- a/nw/gui/mainmenu.py
+++ b/nw/gui/mainmenu.py
@@ -3,10 +3,10 @@
 
  novelWriter – GUI Main Menu
 =============================
- Class holding the main window
+ Class holding the main window menu
 
  File History:
- Created: 2019-04-27 [0.0.1] (Split from winmain)
+ Created: 2019-04-27 [0.0.1]
 
  This file is a part of novelWriter
  Copyright 2018–2020, Veronica Berglyd Olsen
@@ -274,7 +274,7 @@ class GuiMainMenu(QMenuBar):
 
         # Project > Exit
         self.aExitNW = QAction("Exit", self)
-        self.aExitNW.setStatusTip("Exit %s" % self.mainConf.appName)
+        self.aExitNW.setStatusTip("Exit novelWriter")
         self.aExitNW.setShortcut("Ctrl+Q")
         self.aExitNW.setMenuRole(QAction.QuitRole)
         self.aExitNW.triggered.connect(lambda: self.theParent.closeMain())
@@ -857,8 +857,8 @@ class GuiMainMenu(QMenuBar):
         self.helpMenu = self.addMenu("&Help")
 
         # Help > About
-        self.aAboutNW = QAction("About %s" % self.mainConf.appName, self)
-        self.aAboutNW.setStatusTip("About %s" % self.mainConf.appName)
+        self.aAboutNW = QAction("About novelWriter", self)
+        self.aAboutNW.setStatusTip("About novelWriter")
         self.aAboutNW.setMenuRole(QAction.AboutRole)
         self.aAboutNW.triggered.connect(lambda: self.theParent.showAboutNWDialog())
         self.helpMenu.addAction(self.aAboutNW)
diff --git a/nw/gui/outlinedetails.py b/nw/gui/outlinedetails.py
index 18f2b90f..d19bf2e9 100644
--- a/nw/gui/outlinedetails.py
+++ b/nw/gui/outlinedetails.py
@@ -3,7 +3,7 @@
 
  novelWriter – GUI Project Outline Details
 ===========================================
- Class holding the project outline details view
+ Class holding the project outline details panel
 
  File History:
  Created: 2020-06-02 [0.7.0]
diff --git a/nw/gui/projload.py b/nw/gui/projload.py
index 29c9c9ab..35621032 100644
--- a/nw/gui/projload.py
+++ b/nw/gui/projload.py
@@ -3,7 +3,7 @@
 
  novelWriter – GUI Open Project
 ================================
- The open project dialog
+ Class holding the load/browse/new project dialog
 
  File History:
  Created: 2020-02-26 [0.4.5]
diff --git a/nw/gui/projtree.py b/nw/gui/projtree.py
index 77fdf610..89e41374 100644
--- a/nw/gui/projtree.py
+++ b/nw/gui/projtree.py
@@ -3,7 +3,7 @@
 
  novelWriter – GUI project Tree
 ================================
- Class holding the left side project tree view
+ Class holding the project tree view
 
  File History:
  Created: 2018-09-29 [0.0.1] GuiProjectTree
diff --git a/nw/gui/statusbar.py b/nw/gui/statusbar.py
index 0b95ef16..ace755ae 100644
--- a/nw/gui/statusbar.py
+++ b/nw/gui/statusbar.py
@@ -35,6 +35,7 @@ from PyQt5.QtGui import QColor, QPainter
 from PyQt5.QtWidgets import qApp, QStatusBar, QLabel, QAbstractButton
 
 from nw.core import NWSpellCheck
+from nw.common import formatTime
 
 logger = logging.getLogger(__name__)
 
@@ -206,10 +207,7 @@ class GuiMainStatus(QStatusBar):
         if self.refTime is None:
             self.timeText.setText("00:00:00")
         else:
-            tS = int(time() - self.refTime)
-            self.timeText.setText(
-                f"{tS//3600:02d}:{tS%3600//60:02d}:{tS%60:02d}"
-            )
+            self.timeText.setText(formatTime(round(time() - self.refTime)))
         return
 
 # END Class GuiMainStatus
diff --git a/nw/gui/theme.py b/nw/gui/theme.py
index 9d907a67..2b5f31f5 100644
--- a/nw/gui/theme.py
+++ b/nw/gui/theme.py
@@ -3,7 +3,7 @@
 
  novelWriter – Theme and Icons Classs
 ======================================
- This class reads and stores the themes and the icons
+ Class managing and caching themes and icons
 
  File History:
  Created: 2019-05-18 [0.1.3] GuiTheme
diff --git a/nw/gui/writingstats.py b/nw/gui/writingstats.py
index fa03a278..fb10f7a4 100644
--- a/nw/gui/writingstats.py
+++ b/nw/gui/writingstats.py
@@ -3,7 +3,7 @@
 
  novelWriter – GUI Writing Statistics
 ======================================
- Class showing the word count and session statistics
+ Class holding the word count and session statistics dialog
 
  File History:
  Created: 2019-10-20 [0.3]
@@ -39,6 +39,7 @@ from PyQt5.QtWidgets import (
     QLabel, QGroupBox, QMenu, QAction, QFileDialog, QSpinBox, QHBoxLayout
 )
 
+from nw.common import formatTime
 from nw.constants import nwConst, nwFiles, nwAlert
 from nw.gui.custom import QSwitch
 
@@ -123,11 +124,11 @@ class GuiWritingStats(QDialog):
         self.infoForm = QGridLayout(self)
         self.infoBox.setLayout(self.infoForm)
 
-        self.labelTotal = QLabel(self._formatTime(0))
+        self.labelTotal = QLabel(formatTime(0))
         self.labelTotal.setFont(self.theTheme.guiFontFixed)
         self.labelTotal.setAlignment(Qt.AlignVCenter | Qt.AlignRight)
 
-        self.labelFilter = QLabel(self._formatTime(0))
+        self.labelFilter = QLabel(formatTime(0))
         self.labelFilter.setFont(self.theTheme.guiFontFixed)
         self.labelFilter.setAlignment(Qt.AlignVCenter | Qt.AlignRight)
 
@@ -367,32 +368,28 @@ class GuiWritingStats(QDialog):
 
                 elif dataFmt == self.FMT_CSV:
                     outFile.write(
-                        "\"%s\",\"%s\",\"%s\",\"%s\",\"%s\"\n" % (
-                            "Date", "Length (sec)", "Words Changed", "Novel Words", "Note Words"
-                        )
+                        '"Date","Length (sec)","Words Changed","Novel Words","Note Words"\n'
                     )
                     for _, sD, tT, wD, wA, wB in self.filterData:
-                        outFile.write(
-                            "\"%s\",%d,%d,%d,%d\n" % (sD, tT, wD, wA, wB)
-                        )
+                        outFile.write(f'"{sD}",{tT:.0f},{wD},{wA},{wB}\n')
                     wSuccess = True
 
                 else:
                     errMsg = "Unknown format"
 
         except Exception as e:
-            errMsg = str(e)
+            errMsg = str(e).replace("\n", "<br>")
 
         # Report to user
         if wSuccess:
             self.theParent.makeAlert(
-                "%s file successfully written to:<br> %s" % (
+                "%s file successfully written to:<br>%s" % (
                     textFmt, savePath
                 ), nwAlert.INFO
             )
         else:
             self.theParent.makeAlert(
-                "Failed to write %s file. %s" % (
+                "Failed to write %s file.<br>%s" % (
                     textFmt, errMsg
                 ), nwAlert.ERROR
             )
@@ -455,7 +452,7 @@ class GuiWritingStats(QDialog):
             return False
 
         ttWords = ttNovel + ttNotes
-        self.labelTotal.setText(self._formatTime(ttTime))
+        self.labelTotal.setText(formatTime(round(ttTime)))
         self.novelWords.setText(f"{ttNovel:n}")
         self.notesWords.setText(f"{ttNotes:n}")
         self.totalWords.setText(f"{ttWords:n}")
@@ -544,7 +541,7 @@ class GuiWritingStats(QDialog):
 
             newItem = QTreeWidgetItem()
             newItem.setText(self.C_TIME, sStart)
-            newItem.setText(self.C_LENGTH, self._formatTime(sDiff))
+            newItem.setText(self.C_LENGTH, formatTime(round(sDiff)))
             newItem.setText(self.C_COUNT, f"{nWords:n}")
 
             if nWords > 0 and listMax > 0:
@@ -567,17 +564,8 @@ class GuiWritingStats(QDialog):
             self.listBox.addTopLevelItem(newItem)
             self.timeFilter += sDiff
 
-        self.labelFilter.setText(self._formatTime(self.timeFilter))
+        self.labelFilter.setText(formatTime(round(self.timeFilter)))
 
         return True
 
-    def _formatTime(self, tS):
-        """Format the time spent in 00:00:00 format.
-        """
-        tM = int(tS/60)
-        tH = int(tM/60)
-        tM = tM - tH*60
-        tS = tS - tM*60 - tH*3600
-        return "%02d:%02d:%02d" % (tH, tM, tS)
-
 # END Class GuiWritingStats
diff --git a/nw/guimain.py b/nw/guimain.py
index 6742a0d9..9b1a8a42 100644
--- a/nw/guimain.py
+++ b/nw/guimain.py
@@ -3,7 +3,7 @@
 
  novelWriter – GUI Main Window
 ===============================
- Class holding the main window
+ Class holding the main application window
 
  File History:
  Created: 2018-09-22 [0.0.1]
diff --git a/tests/test_common.py b/tests/test_common.py
index 4dc9cfcf..2a24f31f 100644
--- a/tests/test_common.py
+++ b/tests/test_common.py
@@ -7,7 +7,7 @@ import pytest
 
 from nw.common import (
     checkString, checkBool, checkInt, colRange, formatInt, transferCase,
-    fuzzyTime, checkHandle, formatTimeStamp
+    fuzzyTime, checkHandle, formatTimeStamp, formatTime
 )
 from nwtools import cmpList
 
@@ -78,11 +78,29 @@ def testColRange():
     )
 
 @pytest.mark.core
-def testFormatTime():
+def testFormatTimeStamp():
     tTime = time.mktime(time.gmtime(0))
     assert formatTimeStamp(tTime, False) == "1970-01-01 00:00:00"
     assert formatTimeStamp(tTime, True) == "1970-01-01 00.00.00"
 
+@pytest.mark.core
+def testFormatTime():
+    assert formatTime("1") == "ERROR"
+    assert formatTime(1.0) == "ERROR"
+    assert formatTime(1) == "00:00:01"
+    assert formatTime(59) == "00:00:59"
+    assert formatTime(60) == "00:01:00"
+    assert formatTime(180) == "00:03:00"
+    assert formatTime(194) == "00:03:14"
+    assert formatTime(3540) == "00:59:00"
+    assert formatTime(3599) == "00:59:59"
+    assert formatTime(3600) == "01:00:00"
+    assert formatTime(11640) == "03:14:00"
+    assert formatTime(11655) == "03:14:15"
+    assert formatTime(86399) == "23:59:59"
+    assert formatTime(86400) == "1-00:00:00"
+    assert formatTime(360000) == "4-04:00:00"
+
 @pytest.mark.core
 def testFormatInt():
     assert formatInt(1000) == "1000"
diff --git a/tests/test_item.py b/tests/test_item.py
index 936ba185..95aa8470 100644
--- a/tests/test_item.py
+++ b/tests/test_item.py
@@ -252,7 +252,7 @@ def testItemXMLPackUnpack(nwDummy):
     xDummy = etree.SubElement(nwXML, "item", attrib={"handle": "0123456789abc"})
     xParam = etree.SubElement(xDummy, "invalid")
     xParam.text = "stuff"
-    assert theItem.unpackXML(xDummy) # Passes, but not saved
+    assert not theItem.unpackXML(xDummy)
 
     # Pack Valid Item
     xDummy = etree.SubElement(nwXML, "group")