I've read a lot about Players not being able to Login. I haven't had these problems, but after playing the last ranked, I logged in for the next game. I disconnected from PVP-Network ('!You have disconnected from PVP.Net. Attempting to restore your game upon reconnect...'), tried it several times now and it didn't work.
Since it is a rankedQ, I didn't leave yet ...
Just a few seconds ago an update 'Ranked Qs are disabled' hit the Boards.
Had to quit the game with Taskmanager.
Cannot log in now.
Edit. According to Lolking, I just lost 17 LP for 'dodging' ....
Awesome, at least the system punishes you, if everything else fails.
Edit2: Got my LPs back, ty Rito!