diff --git a/.gitignore b/.gitignore
index 507ce3d..a7e0f65 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,4 +14,6 @@ quirks/*
 *.pkl
 Pesterchum.dmg
 *.md.backup
-subscript.txt
\ No newline at end of file
+subscript.txt
+package-lock.json
+package.json
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c5418c..b5921b0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@
 
 ### Changed
 - setup.py build description to just "Pesterchum"
+- Made file capitalization consistent for a few files. (.PNG --> .png), because some file systems are queasy on that. (See https://superuser.com/questions/881804/case-sensitive-file-extensions-in-windows-and-linux) 
 
 ## [v2.1.1] - 2021-4-12
 
@@ -23,7 +24,7 @@
 - Fixed sRGB profile in steamchum.
 
 ### Changed
-- convo/tabwindow on trollian seems to be used for the general background color, so, I changed it to a value. I'm not use if this was intentional.
+- convo/tabwindow on trollian 2.5 seems to be used for the general background color, so, I changed it to a value. I'm not use if this was intentional.
 
 ## [v2.1.0] - 2021-4-11
 
diff --git a/themes/paperchum/chumbg.PNG b/themes/paperchum/chumbg.png
similarity index 100%
rename from themes/paperchum/chumbg.PNG
rename to themes/paperchum/chumbg.png
diff --git a/themes/paperchum/othertabbg.PNG b/themes/paperchum/othertabbg.png
similarity index 100%
rename from themes/paperchum/othertabbg.PNG
rename to themes/paperchum/othertabbg.png
diff --git a/themes/paperchum/scrollhandle.PNG b/themes/paperchum/scrollhandle.png
similarity index 100%
rename from themes/paperchum/scrollhandle.PNG
rename to themes/paperchum/scrollhandle.png
diff --git a/themes/paperchum/selectedbg.PNG b/themes/paperchum/selectedbg.png
similarity index 100%
rename from themes/paperchum/selectedbg.PNG
rename to themes/paperchum/selectedbg.png
diff --git a/themes/paperchum/tabbg.PNG b/themes/paperchum/tabbg.png
similarity index 100%
rename from themes/paperchum/tabbg.PNG
rename to themes/paperchum/tabbg.png
diff --git a/themes/paperchum/timeslider.PNG b/themes/paperchum/timeslider.png
similarity index 100%
rename from themes/paperchum/timeslider.PNG
rename to themes/paperchum/timeslider.png
diff --git a/themes/steamchum/chumbg.PNG b/themes/steamchum/chumbg.png
similarity index 100%
rename from themes/steamchum/chumbg.PNG
rename to themes/steamchum/chumbg.png
diff --git a/themes/steamchum/mood base.PSD b/themes/steamchum/mood base.psd
similarity index 100%
rename from themes/steamchum/mood base.PSD
rename to themes/steamchum/mood base.psd
diff --git a/themes/steamchum/othertabbg.PNG b/themes/steamchum/othertabbg.png
similarity index 100%
rename from themes/steamchum/othertabbg.PNG
rename to themes/steamchum/othertabbg.png
diff --git a/themes/steamchum/scrollhandle.PNG b/themes/steamchum/scrollhandle.png
similarity index 100%
rename from themes/steamchum/scrollhandle.PNG
rename to themes/steamchum/scrollhandle.png
diff --git a/themes/steamchum/selectedbg.PNG b/themes/steamchum/selectedbg.png
similarity index 100%
rename from themes/steamchum/selectedbg.PNG
rename to themes/steamchum/selectedbg.png
diff --git a/themes/steamchum/tabbg.PNG b/themes/steamchum/tabbg.png
similarity index 100%
rename from themes/steamchum/tabbg.PNG
rename to themes/steamchum/tabbg.png
diff --git a/themes/steamchum/timeslider.PNG b/themes/steamchum/timeslider.png
similarity index 100%
rename from themes/steamchum/timeslider.PNG
rename to themes/steamchum/timeslider.png