Hi Absic, thanks for the response.
I sent a support request into Gigabyte a few days before posting this thread. Unfortunately, I have yet to hear back from them.
My 15-day return window was coming to a close, so I've since returned the motherboard and opted for an Asus F1A75-M. I would have MUCH preferred the Asus F1A75-M Pro, but Fry's doesn't seem to carry it. I would have been willing to give a different FM1 Gigabyte board a chance if Fry's carried other models, too.
If I could have figured out a way to flash to a different BIOS, I would have given that a try, but the board wouldn't even get to post. Since flashing the BIOS was successful, the backup BIOS got overwritten with the faulty F4 BIOS as well, so I was pretty much SOL.
I will say that the Gigabyte board had a LOT more useful BIOS options than the Asus board I'm using now. Kind of a shame, really. On the plus side, it's just a little media box rig, so it doesn't need to be too fancy.
For anyone curious about the AMD A75 chipset and A6/A8 APUs, it's been pretty impressive so far. I'm using it with XBMC to stream shows and movies from my NAS. As a media box, the idea is that it would be on pretty much 24/7, so I didn't want to have a high wattage system, but I wanted enough juice to play occasional games like Civ V. The A6-3500 is pretty much perfect for that. The integrated HD 6530D totally does its job, and I don't even need a video card. It's a Blu-Ray Player/Gaming Rig/Media Server all-in-one for just $350. I'm pretty happy.