Obviously I can log in on browsers no problem.. as I'm posting this. I've tried changing account details but no luck.
This happened once before, possibly after another maintenance where I just can't log in using the launcher. No matter how accurately I put in my details so that there is literally ZERO chance of getting it wrong. 'Incorrect Username or Password'.. Been like this for like 30 minutes at the moment.

Anyone else or should I just hang myself now?