This is definitely related to the new Human gtk theme, I tried it with many icon themes and all of them show the same glitches, but only with Human controls, it doesn't happen with Clearlooks or Glider for example.
-- Graphical glitches on Muine/Totem buttons using new Human theme https://launchpad.net/bugs/39624 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
