First, is this the correct forum for Beta feedback?
If so, I encountered a significant problem trying to use R#2.0 Beta with VS 2003. VS started hanging and then crashed with an out of memory error. The second time this happened, I uninstalled 2.0 and went back to 1.5.1 and now my keymap is all messed up.
I haven't used any of the EAP builds and everything had been relatively stable since I first installed 1.5.1 several months ago. If it matters, my solution has one pretty large project (a C# DLL) and uses SourceSafe.