http://devgurus.amd.com/message/1280832#1280832
Please fix this AMD. Longtime AMD fan here and I work in support, if this goes live on may 15th with the release of the biggest video game of the year, there will be a giant public reaction to this. The issue is, Diablo 3 apparently WILL NOT RUN AT ALL with catalyst 12.4 or 12.3.
IN SHORT. FIX THIS. Don't let the situation with Rage repeat itself - AMD has a BAD reputation from incidents like this. I don't know where to best post this, but please contact catalyst creator to make sure this doesn't go live.