Hmm, according to that ticket on the texwork site, someone else has the same problem, so it doesn't seem to be something unique to your set up. I'm surprised that it's SyncTeX that's the culprit, since the project page hasn't been updated since 2008, unless it's moved.
Unfortunately, I can't help you further with this, as I don't have an Ubuntu box to test on. Hopefully someone else will come up with a solution. -Andy -------------------------------------------------- Subscriptions, Archive, and List information, etc.: http://tug.org/mailman/listinfo/xetex
