Strange: after removing all the packages mentioned above (all that mediawiki1.7 are dependent on and the ones mentione in the apt-get command above, gksudo gives the same warning but is able to open gedit in su mode.
Starting gedit with sudo gives no warnings and works. -- gksudo GnomeUI Warning https://launchpad.net/bugs/23917 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
