I updated to 1.2.5 the other day and I've had a ton of problems since. All my drivers are up-to-date and none of the common fixes work for it. Some of the problems I have with it:
-50% of the time I cannot load the client at all (error loading the configuration)
-Random black screens when logging in
-Screne freezing and booted to lobby (happens arbitrarily, any single action in the game can trigger it)
-Lobby freezing, causing a 1-2 min wait for login (happens arbitrarily ~50% of the time)
I'm reinstalling 1.2.4 as we speak