GAME CRASH AFTER CHAMPION SELECTION

Since the last patch where and were introduced as zombies, and as the slayers, and as the hairy football for the sake of demonstration, I cannot get into lol games. Just after the lock in of champions, I get a black screen and return back to "The game has crashed" with and option to reconnect. Of course reconnecting doesn't help. I tried restarting LOL, and my pc... nothing works. can't even get loaded in custom games. Please look in the matter before Mister LeaverBuster performs his magic trick.