Well, I really don't know. I'd google and try to find it out.
Perhaps I discovered a little flaw: The cheat sends information about the current day in the packet, hashed near the password.
This forced the users to switch back the date to yesterday.
To the origional post: That's not hacking. I refuse to let ignoramus redefine words like that. You guess a password, great, but you're not a hacker for it. You download a hacked client, that's great, but you're not a hacker for it.