Champion suicide...
I've been playing a few games where this happened: Right from the beginning of the game, my champ goes down mid lane and gets killed by the tower/enemy mid lane champion. It doesn't matter where i send my champ to, if i go bot, mid, top or jungle, my champion always go down mid and gets killed. When i respawn, the bug starts over, sending me down mid again. If i restart the game nothing happens, and the only thing i can do after a couple of deaths is to exit the game.
If anyone else is experiencing this bug, or knows how to get rid of it, please reply, i'm getting a lot of reports for no fault of my own.