That's not a D3 bug but a problem at the ATI at the new drivers that it is not yet fixed.
I had the same issue and the blizzard answered in these terms:
"We have recieved reports about this and we are aware of this matter. This is provoked by an issue in the latest Catalyst Drivers from ATI.
Currently ATI has not fixed this in the new drivers and the only stable version that won't affect Diablo III is the 13.2 Catalyst driver.
To install these drivers be sure to first remove completely the drivers you have installed.
Once you do so you'll be able to install this version without any problem.
This will fully fix this for you without any other problems arising."