Earlier today I installed WoW 3.3.5a (not from here) and got inside the game into Blackrock just fine.
Then I installed the updated 3.3.5a from the website (for the new models and such) and whenever I try to enter the game it says
"Unable to connect. Please try again later. If the problem persists, please contact technical support at..."
When I checked the Logs folder and checked the "connection" textfile, it read this:
"6/15 01:34:23.397 GRUNT: state: LOGIN_STATE_CONNECTING result: LOGIN_OK
6/15 01:34:25.065 GRUNT: state: LOGIN_STATE_FAILED result: LOGIN_SERVER_DOWN
6/15 01:34:25.090 GRUNT: state: LOGIN_STATE_FAILED result: LOGIN_FAILED"
Which made me think maybe the server went through a maintenance or something..
But it's been about 6 hours and it's still the same, and I see that there are people on the realm as we speak.