You got the message from gedit, not grub.
** Description changed: I got the following message during an update to grub on Ubuntu 12.04. Is it serious? xxx@yyy:~$ sudo gedit /etc/default/grub [sudo] password for xxx: (gedit:2540): GLib-GIO-WARNING **: Missing callback called fullpath = /root/.local/share/recently-used.xbel - - xxx@yyy:~$ sudo update-grub - Generating grub.cfg ... - Found linux image: /boot/vmlinuz-3.2.0-24-generic-pae - Found initrd image: /boot/initrd.img-3.2.0-24-generic-pae - Found linux image: /boot/vmlinuz-3.2.0-23-generic-pae - Found initrd image: /boot/initrd.img-3.2.0-23-generic-pae - Found memtest86+ image: /boot/memtest86+.bin - done - xxx@yyy:~$ - - ProblemType: Bug - DistroRelease: Ubuntu 12.04 - Package: grub2 (not installed) - ProcVersionSignature: Ubuntu 3.2.0-24.37-generic-pae 3.2.14 - Uname: Linux 3.2.0-24-generic-pae i686 - ApportVersion: 2.0.1-0ubuntu7 - Architecture: i386 - Date: Sat May 19 16:43:37 2012 - EcryptfsInUse: Yes - InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423) - ProcEnviron: - TERM=xterm - PATH=(custom, no user) - LANG=en_US.UTF-8 - SHELL=/bin/bash - SourcePackage: grub2 - UpgradeStatus: No upgrade log present (probably fresh install) ** Package changed: grub2 (Ubuntu) => gedit (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1001766 Title: GLib-GIO-WARNING **: Missing callback called fullpath To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gedit/+bug/1001766/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs