graphics corruption
 

sometimes I get little streaks of green and red in the x button image or icons in the applications menu. these disappear after a restart but I'm starting to worry about whether this is a hardware problem causing this. does anybody else get this icon graphics corruption?
I also seem to get this in firefox mobile with some flash ads

http://img258.imageshack.us/img258/9...0011108402.png
http://img258.imageshack.us/img258/s...png/1/w800.png