Comment 8 for bug 675273

No, unfortunately, it is not just bad CSS linking. All externally linked files are not loaded even when all the links are correct. I tried linking them with absolute paths, but it didn't help.
I ended up using the Karmic switcher for my remix - it also doesn't work as shipped in Ubuntu, but I managed to fix it. But this about:home seems like mysticism to me.

By the way, there's a very similar bug #675271, I think they are connected somehow.