Recently, the quick control dial on my 1D3 no longer changes aperture or shutter values (depending on the setting in C.Fn IV:5), while in M mode. It otherwise seems to work fine in other uses. I'm kinda new to this camera, so it's entirely possible there's a setting I've changed. I've cleared all functions and settings, but to no avail. There is a work around in changing from M to AV to change the aperture with the main dial, but that's far too cumbersome for my "speed" camera.
Before I send it in to be "repaired", does anyone have any ideas what might be causing this? Broken? or User Error?