I have a 30D that has barely been used (about 1000 shots). Yesterday, the Main Dial suddenly began to slip when rotated. The normal clicks were not present and it failed to affect the settings.
I got it clicking and responding in the clockwise direction, but not counter-clockwise. I eventually managed to get it working counter-clockwise, but only by using the side of my finger putting some pressure on the side of the dial as it turned.
I don't know if this slipping is normal (under certain circumstances), or whever the dial, which is made of rubber, is no longer firmly glued/attached to its spindle.
This is a minor mechanical fault (I think) but I suspect it's going to cost a fair bit to get repaired by Canon. Has anyone experienced this before?