I have a weird problem here using gEdit. It's gEdit 3.2 in Ubuntu 11.10.
When I select some piece of text, this should be white text on orange background (Unity 11.10 default).
Suddenly it started acting different: When I select text, it is white text on actual background color (white on black, for instance).
I don't know if it's related to gEdit or Unity, but sice Ubuntu 11.10 I can change only default font and theme in "Edit -> Preferences -> Fonts & Colors". No other "tweakable" option is available. The problem occurs no matter what theme I chose.
I have no idea why this happens and how to solve this. Has anyone seen something similar?