This bug that I commented in a previous blog entry and that I reported to Micorosoft through Microsoft Connect is not going to be fixed in the next version VS 2010:

Add-in causing stack overflow causes “Microsoft Visual Studio has encountered a problem and needs to close”
https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=414301

So, there will be three versions of Visual Studio affected. I have written a MZ-Tools article to document it:

BUG: Infinite recursion in add-in causes Visual Studio crash
http://www.mztools.com/articles/2009/MZ2009004.aspx