We had a number of reports about Intellisense crashes soon after the RC was released.  After much investigation, the vast majority of reports have boiled down to two issues.  We released a patch for the more common of the two a week or so ago.  We've just released a patch for the second and customers who have tried the two patches are reporting that all of their Intellisense crashes are gone.

Try them out and let us know if you are still seeing any IDE instability.

Brian