We've recently become aware that playing Diablo III with the latest Catalyst 12.4 drivers for ATI cards may cause some visual artifacts for specific hardware configurations. This issue affects users of ATI Radeon HD 2400, 2600, 2900, 3400, 3600 and 4500 graphics cards under Windows Vista and Windows 7. ATI Radeon HD 4600, 4700, 4800, 5000, 6000 and 7000 series products are unaffected, as is Windows XP.
ATI is aware and investigating. Until a solution can be provided we recommend those affected use the Catalyst 12.3 drivers.
So if you upgraded your drivers already, make sure to roll back to 12.3 version
Also forum needs better blue font color, you can't quote blue posts atm