I'm not sure if I gave this a good title, if anyone can think of a better one then please edit it! My menu and file manager icons look like this:
They sort of change when you put your mouse over them like this:
It also happens in File Manager:
I have Debian XFCE on a Powerbook G4.
I'm running Linux debian 2.6.32-5-powerpc. I have 24-bit colour depth. My screen dimensions are 1280 x 854. My graphics card is VGA compatible controller: ATI Technologies Inc RV350 [Mobility Radeon 9600 M10]