Firefox 3.5 Rendering Issues

I've been working on a Facebook Connect application and when I went to visit the Facebook Developer's documentation, it looked like this:

It seems the 50% speed increase in Firefox 3.5 is due to the fact that is neglects to render 50% of the CSS.  In chrome and other browsers, it renders fine.

So I checked the Acid2 Test in Firefox 3 and this is what rendered.

Amazing... IE 8 renders the Acid2 Test correctly and Firefox 3.5 does not.  I would say this is a pretty huge err on Firefox's part.  I hope they correct it soon.