I'm not sure. One was mentioned on ScottGu's msdn blog, and it was a crash-related patch. I believe he said it would be included in a VS2010 update (which is separate from a Windows update -- you can check from within VS).

>>are you using matched memory? If not, I think you are right in suspecting memory. I assume you've installed at hotpatches for VS2010.
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>Are the hotpatches for VS 2010 part of Windows Updates or we have to find them somewhere on the net?