When I upgraded to a more recent version of the Catalyst Control Center, I was advised that I was no longer able to use HDMI audio as I was using an "incompatible" DVI -> HDMI adapter. Given that I wasn't even using a DVI -> HDMI adapter ANYWHERE within the chain and was—in fact—leveraging the HDMI port soldered onto the card itself, well, I'd say this was a pretty massive fuckup. Now I think I get it: AMD probably just tacked the same sort of circuitry one would see in an DVI -> HDMI adapter on the board but neglected that EEPROM and now that the drivers are updated, I was fucked.
AMD's stereoscopic HDMI does not work, even with the third-party $25-50 drivers one has to buy because they're too cheap to write their own or license them. AMD response? "We don't provide support for 3rd-party software." Buck passing. I have yet to find any solution that enables the card to produce a stereoscopic HDMI signal, yet my PS3 has no difficulty.
I rolled back.