Seems to be a compiz issue. In the meantime, you can use Unity 2d instead. Install it from software center.
** Project changed: unity => compiz ** Package changed: unity (Ubuntu) => compiz (Ubuntu) -- You received this bug notification because you are a member of compiz packagers, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/757486 Title: Severe visual distortion in unity desktop _______________________________________________ Mailing list: https://launchpad.net/~compiz Post to : [email protected] Unsubscribe : https://launchpad.net/~compiz More help : https://help.launchpad.net/ListHelp
