Acknowledged bug listings
In response to a comment on my bug post...
You can find Micrsoft acknowledged bugs by going to:
http://support.microsoft.com/default.aspx?pr=kbhowto
Then choose the product (language), and type “BUG” as the search text. You can probably find some by searching for “FIX” as well.
The following link is from a search for “BUG” under product: .NET Framework.
Search Results