Mafia Wars Beat the Feds yanked for a second time -- foiled again!

Update (8/14): Beat the Feds has returned to the game, though it still has been very buggy for some players. Is it working for you?

Mafia Wars launched the new Beat the Feds challenge today and after complaints about various bugs, rolled back the new mission with no indication on when it would be back again. This is the second time that this special mission has launched and was rolled back again -- the first time, the challenge went live for a few hours and was yanked as well.

Below is the error message I got when I tried to attack Agent Karlin. When I hit the red button, the bar under Karlin said 'undefined/900' and nothing happened. Clicked again -- nothing happened. Then Mafia Wars wouldn't load and when it finally refreshed, the event had disappeared from the game.