[XeTeX] Wacky behavior of XeLaTeX in TeXLive 2011

[Andy Lin]

I don't use Ubuntu, but if you have both TL2010 and 2011, I'd check
the directories that are in fontconfig (or run fc-cache -v and see
which directories it's looking in). It may be that fontspec is
complaining because it finds duplicate sets of fonts between the two
installations. Your PDFs would be OK because the font files are
otherwise identical, but you'll likely notice problems if you had
different versions of the same font.

As for the other problem with SyncTeX... I can only imagine it's
somehow related. Possibly a PATH error?

HTH,
Andy