We're seeing an awful lot of these lately. I think we all need to put some time in and dig down to understand what is causing the problem.
Other folks who have reported this problem either say...woops, my bad...was using wrong password, or never let us know what eventually fixed their problem if anything.
Here is the only different answer I have seen so far:
I don't know man , if i check the remember account name , log in and log back out and then only write my password i get "unable to connect" , if i write the account manually it works so wtf... tried this a few times just now. I guess whatever

that makes me think he had saved the wrong name to start with. Who knows. We should keep looking.