Okay, now that we are over the sensationalist headline, the actual problem is more complex than that. Let us assume that we have the following interface:
public interface IComplexGeneric<T>
Up until .Net 3.5 SP1, Rhino Mocks was perfectly happy to deal with such an interface (well, not happy, exactly, that requires some hard core code). With .Net 3.5 SP1, this generate an Execution Engine Exception.
Fabian Schmied was kind enough to prove that select is broken here. This is the connect site issue, and I would appreciate it if you can vote for it.
The work around for this would mean that I will have to remove support for mocking F#, C++ and Spec# from Rhino Mocks, and I am reluctant to do so.
This is fixed, you can get the fix here: http://support.microsoft.com/?id=957541