You wouldn't happen to be using an early ATI Radeon (like a 7000), would you?
** Changed in: Ubuntu Status: Unconfirmed => Needs Info -- when using ubuntu human theme random dotted lines could be seen on the buttons. when the curser hovered above the buttons the lines disapearred https://launchpad.net/bugs/56517 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs