No it's not fixed in 7.2 or 7.3 (I'm holding my breath that it will be fixed in 7.4 ... agghhh out of breath...)

IE6 and IE7 are the ones most often that are unable to handle it due to how it interprets CSS code.

The programmers for UBB are aware of it and methods to correct it have been discussed.

Now maybe it's a race to see if UBBT fixes it first or if IE8 comes out first. IE8 is on the way and it shows signs of following standards better than Firefox