Starting out a TROUBLESHOOTING.txt doc

docs/CHANGES.txt

@@ -7,7 +7,7 @@ Various contributors (see below, and AUTHORS.txt)
 https://tuxpaint.org/
 
 
-2023.March.8 (0.9.29)
+2023.March.9 (0.9.29)
   * Improvements to "Stamp" tool:
     -----------------------------
     * Stamps may now be rotated.
@@ -376,6 +376,11 @@ https://tuxpaint.org/
     * New "Quickstart Guide" document added.
       Bill Kendrick <bill@newbreedsoftware.com>
 
+    * "Troubleshooting" document added (work-in-progress, and
+      mostly for developer use when getting info. from users
+      experiencing problems)
+      Bill Kendrick <bill@newbreedsoftware.com>
+
     * Magic tool API documentation updated to match other docs,
       and allow for localization.  (Maintained in "tuxpaint-docs" repo.)
       Bill Kendrick <bill@newbreedsoftware.com>

docs/TROUBLESHOOTING.txt

@@ -0,0 +1,59 @@
+Troubleshooting Guide for Tux Paint
+
+Last updated: 2023.03.09
+
+Questions
+=========
+For users, the following is a list of information you can send the
+Tux Paint developers when opening a ticket at SourceForge.net or
+emailing us for assistance.
+
+Tux Paint project members, if someone has asked you for help, there is
+information you can gather before passing it along to the developers
+(in particular, those who help maintain the various ports of Tux Paint).
+
+Windows
+-------
+ * The version of Windows (e.g., "Windows 11 Pro 22H2")
+ * The version of Tux Paint (e.g., "0.9.28-3")
+ * Type of the package used -- Installer EXE or Portable ZIP version
+ * If Installer, Which installation type was selected while -- "All Users"
+   or "Current User Only"
+ * Send a copy of the config file, e.g. "tuxpaint.cfg" in
+   C:\Users\username\AppData\Roaming\TuxPaint\
+ * Send any debugging output files, e.g., "stdout.txt" and "stderr.txt"
+   in C:\Users\username\AppData\Roaming\TuxPaint\
+ * FIXME -- Anything else?
+
+macOS
+-----
+ * The version of macOS (e.g., "macOS 13.1 Ventura")
+ * The CPU type (e.g., "Intel x86_64", or "Apple Silicon M1")
+ * The version of Tux Paint (e.g., 0.9.28-3)
+ * Send a copy of the config file, e.g. "tuxpaint.cfg" in
+   $HOME/Library/Application Support/TuxPaint/
+ * FIXME -- Current way to grab stderr/stdout output
+   (may need to describe how to get the Terminal app?)
+ * FIXME -- Anything else?
+
+Android
+-------
+ * The version of Android (e.g., "Tiramisu (OS 13)")
+ * The version of Tux Paint (e.g., "0.9.28-1" aka "9281")
+ * The source of Tux Paint -- Google Play, F-Droid, direct APK download
+ * Any changes made to Tux Paint configuration ("gear" icon)
+   FIXME -- Is there an easy way to grab the config file?
+ * FIXME -- Anything else?
+
+Linux
+-----
+ * The Linux distro and version (e.g., Ubuntu 22.04, RHEL 9, etc.)
+ * The version of Tux Paint (e.g., "0.9.28-3")
+ * The source of Tux Paint -- built from source code, installed
+   from distro's software repository, direct package file download
+   (.rpm), Flatpak, etc.
+ * Send a copy of the config file, e.g. ".tuxpaintrc" in $HOME
+ * Any output seen on a terminal when running "tuxpaint" from
+   a command-line
+ * FIXME -- Anything else?
+