This is the first time that this has happened to me ... I tried to login to submit my score and get my medals.  My screen name was too long to enter.  Does this mean I can never get my medals?  This doesn't happen with any other game.  Any advice?  THANKS!

Hey!  I was having the same issue, when my username used to be Cursemymetalbody - I emailed Playfirst and I got a reply saying they'd look into it, but recommended that I change my username to a shorter one.  I didnt even realized I could do that.  If you try that it might work (I have yet to try, but it should work I think).  Anywho hope this helps!!
Oh if you're not sure where to do that - just go to your account settings, and under ther Account Info tab (i believe its called), there's a box to change your username

I've got the same problem. I was so excitied to finally get this game, I wait till it's avaliable in the stores, and my username was way to big. I was thinking about changing it, but I didn't know if I would lose all my other medals or what. I have yet to try it. 

I have the same problem when I first submitted my score, what I did was, exit the games and open it again then I successfully submit my score.

No, the problem for me is that my username is to long for this game. For anybody who knows, does changing your username effect your medals you already have? I mean if I cahnged my username would I have to resubmit all the games I've played so far to get my medals back?

No, changing username does not effect to medals.

Thanx for the answer.