Cannon 60D Quick Control Dial Not Working !

[focusgfx]

Hi, I bought a cannon 60D camera 2 months ago, a week ago I was shooting some photos and I noticed that QCD is not working in any mode !!, I was using it in (M)anual mode and it didn't change the apereture.
I did a search on google and found that there are two people having the same problem, and one of them has a post here, and the other one said that it went working again suddenly by itself !
is this a common problem with the cannon 60D ?
if anyone have a solution please share it, thanks in advance

[focusgfx]

I sent my camera to the technical support and they fixed it, they said that there were a flat cable was cut down!
how is this possible after only two month of use ?
I recommend not buying this camera as it appears that it has this problem.

[mdm041]

Is the lock on?  I've seen more than one person have the same issue and all that happened was the control lock got turned on by accident.