The same error may happen at 32bit 11.04 However, a solution and explanation is provided here in the ubuntu forums :
http://ubuntuforums.org/archive/index.php/t-1631433.html -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gedit in Ubuntu. https://bugs.launchpad.net/bugs/776678 Title: gtk-warning after running gksu gedit -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
