This isn't a bug, the behavior is expected as the GTK+ application is launched with root privilege but the session is run using another user. So it warns that the owner of ibus's configuration file isn't root, and it's only a warning.
** Changed in: ibus (Ubuntu) Status: Confirmed => Won't Fix -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to ibus in Ubuntu. https://bugs.launchpad.net/bugs/1125944 Title: (gedit:3366): IBUS-WARNING **: The owner of ~/.config/ibus/bus is not root! Status in “ibus” package in Ubuntu: Won't Fix Bug description: RR i386 logged as gnome-classic (fallback) Seen that error for the first time while using a terminal: oem@oem-desktop:~$ sudo gedit /etc/default/grub (gedit:3366): IBUS-WARNING **: The owner of /home/oem/.config/ibus/bus is not root! That one is own by "Me" (screenshot joined) ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: ibus 1.4.2-0ubuntu1 ProcVersionSignature: Ubuntu 3.8.0-6.13-generic 3.8.0-rc7 Uname: Linux 3.8.0-6-generic i686 NonfreeKernelModules: nvidia ApportVersion: 2.8-0ubuntu4 Architecture: i386 Date: Fri Feb 15 08:33:36 2013 MarkForUpload: True SourcePackage: ibus UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ibus/+bug/1125944/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp