Just to let you know (in case you don't) that someone (
Bjørn Bouet Smith) provided a thread safety fix for Rhino Mocks but for the reason below did not share it
=> "Some might ask why I did not submit a patch to the author himself, and I
did not do that because it seems like he have abandoned the project
entirely. No code has been checked into the project in over a year."
Sorry to bother you if you already know all this...