Ok, sorry, my earlier answer was incomplete. After posting this I noticed that my graphics were very slow and choppy (due, I guess, to the lack of 3d rendering) and dug a little further. It appears that the problem stemmed from the fact that the libgl1-mesa-glx package was not the official Ubuntu version, but rather a 3rd party version (mediahacks, I think). I noticed this using the command dpkg -l libgl1-mesa-glx, which listed the version string as something like like "7.7.1-ubuntu-mediahacks" (I don't recall exactly) After installing libgl1-mesa-swx11 (which uninstalled libgl1-mesa-glx), I listed the contents of /etc/apt/sources.list.d, and removed the mediahacks repository. I then did an apt-get update, and re-installed libgl1-mesa-glx, which now became the one from the official ubuntu repositories. This fixed the font problem altogether. I don't recall when or why I installed that repository, but the package there would appear to be broken or incompatible with the new clutter. On Mon, May 3, 2010 at 3:29 AM, rorzer