Okay, timeless says I may need to specify -kb when adding the png's. Trying that.

2001-02-19 04:00:48 +00:00 · 2001-02-19 04:00:48 +00:00 · 577ae86586
--- a/themes/classic/global/mac/scroll-thumb-horiz-active.png
+++ b/themes/classic/global/mac/scroll-thumb-horiz-active.png
@ -1 +0,0 @@
-‰PNG
--- a/themes/classic/global/mac/scroll-thumb-horiz.png
+++ b/themes/classic/global/mac/scroll-thumb-horiz.png
@ -1 +0,0 @@
-‰PNG
--- a/themes/classic/global/mac/scroll-thumb-vert-active.png
+++ b/themes/classic/global/mac/scroll-thumb-vert-active.png
@ -1 +0,0 @@
-‰PNG
--- a/themes/classic/global/mac/scroll-thumb-vert.png
+++ b/themes/classic/global/mac/scroll-thumb-vert.png
@ -1 +0,0 @@
-‰PNG