Haven't noticed any problems with SR3.

I never had a problem with the library, and it's still working. Loads faster now.

IDL  is working smoothly. No ugly artifacts when rendering! Before SR3, I would have black splotchiness, so I stopped using it. Precalculation is faster, too.

I haven't had a chance to try Cloth or Hair room with it yet.

I do like the options of the new conforming/scaling in the properties tab. Doesn't always work well, especially with crosstalk. Still testing...

-- Jeff