Well thats a glitch if you go back it might work then that happens to me sometimes its just if you rate games without playing them then it would happen.
Dude, I was adding thing thing 4 to my faves and it took me to the home page. This is getting ridiculous. I can't flag or vote up comments anymore either. wat the ????
Have you tryed just letting it load completely? Just let it go all the way to the main menu or even begin playing it a bit, and then do whatever you want.
Wow, I guess it's just not working for you right now. I say just be patience, go do something else for a while, and try it latter. Hopefully it'll work latter.