SP3.1 over here.
My bugs have to do mostly with drawing issues. Things not updating correctly, and blocks not acting nicely from the 2006 version.
Modeling is fine for the most part now.. (now that we changed out my video card. - Everyone else's is still on order, and they get blue screens closing the program...How awesome is that...

) I had 6 blue screens in one day before my video card was swapped out.