Sent my camera off to Canon Professional Services and they fixed it right up! I was having trouble with back focusing, a few stuck pixels, and noise was really terrible at higher ISOs. I'm happy to report my 1Ds Mark ii is as good as new! Which is great. Because I was freaking out with it. Like I lost a digit or appendage.
Here's a shot of Mushi, shot at f2.8 with my 24-70 USM L lens. Shot at 60mm, ISO 800, 1/160 sec. I tweaked the exposure in Lightroom. No noise reduction!