I'm also running Dapper Beta2 with all updates. Only the Human theme is affected. The 7500 isn't in the list of devices supported by fglrx and it didn't work for me.
-- [Dapper] Buttons have graphics artifacts with Human theme https://launchpad.net/bugs/43904 -- desktop-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
