I was shocked when i moved from Beta to RTM! My whole project was down! Couldn't even Debug! And the next day is Demo! After many agonizing hours of trying everything I could think of or could find on the net. I gave up and went down to a walk. When I came up, I gave it a last shot and Shekhar from BetaOne Services gave me this and this which saved the day.
Thanks Shekhar!
Anyways, if you are in the process of migrating as well, I strongly advice you read read what Scott Guthrie has to say about the RTM version and the Breaking Changes file (also present in the read me) before you proceed....
Cheers!