Why do I see weird things when I use the GIMP with AcceleratedX?
It’s a bug in AcceleratedX with shared memory. Turn off shared memory when you start the GIMP (–no-xshm) or pick up the patch to AcceleratedX’s X server from ftp://ftp.xinside.com/pub/update/ . At least one person has found this bug (or another one with the same symptoms) to still be present in 4.1 .