I haven't personally experience this, so I don't know what to tell you. I wonder if it has something to do with the MGS pack? I'll be getting it tonight, and since you mention this I will try to complete a level and exit the game and see if I encounter the same problem.
Best bet, like jpes said, I'd email MM. I'll let you know how it goes for me, but it won't be until I get off work.







