I dont really use g00gle products, and im not standing at your console to see exactly what happens, so im going to take a stab it in the dark.

Perhaps G00gle has blacklisted a known hostile bot or wormed machine, and thats what is being blocked? if something had a mission to spread far and wide, an open promiscuous account would be a good vector to exploit.

It could possibly be a spoof, so when you log in to see what happened your password gets snarfed