[lukeschlather]

Fan pages don't work like that, at least not for normal users. Unless they have some special authentication system set up for Zuck's personal page, someone gaining access to his Facebook account should gain access to his fan page.

Or if his personal account is not an admin on the page, but again I find that unlikely.

Still, I believe them when they say it was an API bug. I don't see why they would lie and claim it was something else on the day they roll out a fix for the problem.