I wanted to make everyone aware of a new blog entry I wrote for my teams blog regarding .Net servicing issues. It’s located here: http://blogs.technet.com/b/askcore/archive/2010/07/12/are-you-opening-up-a-net-case-with-microsoft.aspx
Because the .Net Framework is both an inbox and out of box installation, it can routinely hit my team as well as some of the developer teams. This should help you get the information you need to get gathered ahead of a support phone call to alleviate any issues with case routing when you open the issue.
Hope this helps….