Ok, my bug is exactly the same as the one posted here; I just found the Xorg bug post here: https://bugs.freedesktop.org/show_bug.cgi?id=22566 and can definitely reproduce the problem at will with Amit's method.
** Bug watch added: freedesktop.org Bugzilla #22566 https://bugs.freedesktop.org/show_bug.cgi?id=22566 -- Window redrawing does not work properly with KDE4 taskbar tooltips. https://bugs.launchpad.net/bugs/325074 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
