I just ran across this article this morning while I was doing the "getting latest" dance with TFS.  I haven't had a chance to really go though the article (although this project update is nailing my cpu for 100% during this entire blogging ...DataCompare is killing me) but the short of it appears there's a way to break the encryption based on "secret numbers" the algorithm knows about.  I might go as far as to tear into the 160 page doc and see what they're talking about but either way, "that ain't cool".