Another problem with authenticator here...
logged in the morning to check AH, was ok!
then tried after lunch cannot login...
Can't even login into battle-net acc.
Now, will need my CD key which is at home.. as my secret p/w don;t work..
demn...

My account is ok now...
you will need to 're-synchronize' your authenticator to log in.
Note that even if hacker hack into your acc... he will still need the authenticator to change. So it is important to attach an authenticator to your account.