The Ubuntu Feisty Fawn update from yesterday gave me an interesting issue when I restarted later on. It could not find my fonts! The following was displayed when trying to start GDM:
could not open default font ‘fixed’
After some digging it seems like the font directories have been moved, so X can no longer find the fonts. To fix this, just open up /etc/X11/xorg.conf and edit the font lines to look like this:
# path to defoma fonts
The old font path was /usr/share/X11/fonts, which at least for me is now empty.