New Patched Messed game up

If i try to Log into the game after this new patch, The game crashes and an error pops up, i submitted the error/issue when it asked me but idk if anyone elts is having this problem, i'll see if i can submit a screenshot soon...is it suppose to have the Cataclysm log-in screen now or did it mess up? cuz i know the expation's not coming out until Dec.
idk what to do, hope someone can help or it's a game issue being fixed someone let me know please.

Thank you