Comment 5 for bug 1156927

It just happened again after today upgrade:

[quote]The following packages will be upgraded:
  autopkgtest cups-browsed cups-filters cups-filters-core-drivers gir1.2-gdkpixbuf-2.0 gir1.2-rb-3.0 grub-common grub-pc grub-pc-bin grub2-common kerneloops-daemon libcupsfilters1 libfontembed1
  libgdk-pixbuf2.0-0 libgdk-pixbuf2.0-common librhythmbox-core8 libsnmp-base libsnmp30 libtk8.6 locales memtest86+ rhythmbox rhythmbox-data rhythmbox-mozilla rhythmbox-plugin-cdrecorder
  rhythmbox-plugin-magnatune rhythmbox-plugin-zeitgeist systemd-shim tk8.6 ubuntu-wallpapers ubuntu-wallpapers-saucy xdiagnose
32 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 19,2 MB of archives.
[/quote]

Note the gir1.2-gdkpixbuf-2.0 package !

[quote]Processing triggers for hicolor-icon-theme (0.13-1) ...

(gtk-update-icon-cache-3.0:3581): GdkPixbuf-WARNING **: Cannot open pixbuf loader module file '/usr/lib/x86_64-linux-gnu/gdk-pixbuf-2.0/2.10.0/loaders.cache': No such file or directory

This likely means that your installation is broken.
Try running the command
  gdk-pixbuf-query-loaders > /usr/lib/x86_64-linux-gnu/gdk-pixbuf-2.0/2.10.0/loaders.cache
to make things work again for the time being.
[/quote]