Yes, I was having trouble with the other plugins too. With Kontakt 4, not so much, but with Steinburg Hypersonic 2 (which I've had for years) and Philharmonik Orchestra, they would freeze up and crash the program all the time. Now that 2010.5 is installed, it has been smooooth sailing and I have been able to work on music once again!

This can't just be my computer. I wonder if anyone else is having vst problems with RB 2012.