I know this borders on technical support but...
An answer given here seems to indicate that Error 3003 represents an error related to not playing in the proper region, although I have the full game and am in the Americas region.
What is the actual technical explanation of this error? I get Error 3003 about 50% when I try to play and it results in a very long wait for a timeout after attempting a login before I'm told I have a 3003.
Is this just Blizzards way of throttling the number of login attempts made by a single user by closing the connection server side without sending a FIN to the client indicating the connection should be closed?