Blizzard patched up Diablo 3 tonight with a small fix that resolves the glitch that allows the Wizard to have invulnerability from damage.
We reported on the bug yesterday, and it was easy enough to reproduce. This cheat allowed the Wizard to cruise through the circuits of the entire game without otherwise taking a beating from elites and boss monsters.
Despite the fix for this bug there may yet be more ways to exploit the game, so be sure to report anything you find to the developers at Blizzard by sending an e-mail to [email protected] before you decide to post it on the forum.
The latest patch will be automatically downloaded when you launch the game.