@ Chocobo.
This problem has been since last night when the servers were up. Yes the servers are down "now", but there is a legitimate Authenticating problem that needs to be fixed because when the servers were up, people still had the error. I am thinking that there was a bad string of code that failed to resolve - after the fact - which caused the server to crash.
@ Everyone else. - If you are logging in this morning and you are still on authenticating - it is not because of a bug, as Chocobo stated, but because the servers are currently down. Lets all wait for the DEVs or Admin to do a fix or restart.