Hi there.. Having this problem today where the launcher screen loads EXTREMELY slow and in pieces (sometimes the news links load first, sometimes the login/pwd boxes, but in all cases the launcher window takes 5+ MINUTES to fully load). When I'm finally able to enter my credentials and login, it once again lags for another 2-3 minutes then returns the error message:

Unable to complete version check. [30410][30607][10009][10019]

I've had similar problems when trying to enter the forums - I get an error message "400 Bad Request : Your browser sent a request that this server could not understand."