Canon covers up problem with the Canon 7D camera. I came to this conclusion based on the repair report that I received with camera returned from a warranty repair. I bought the camera just before the New Year. On January 2nd it started to malfunction. I was shooting using this setup

Canon 7D Wireless Setup
It flashed a few times, but then it stopped syncing the PocketWizards. It was curious, that if I turned the camera off, it would sync once again, but then stop syncing.
After a while the camera started to make funny sound in Flash Wireless Master mode and stopped syncing the 580EX too!
At this point I took the camera to the closest service center. The camera was fixed under warranty. Everything works fine now, including the setup shown above, but Canon technician wrote “No problem found” in the repair slip. I still do not know what was wrong with the camera.
Does anybody experience a similar problem? Would not know what is going on with the camera? Why would Canon not disclose the repairs done to the camera?
Canon will never admit they have a problem with there 7D, I’m still going through repair issues with the focusing on this camera, I’ve had 4 of them now, Canon sent me 3 different cameras because they couldn’t fix the other three, every time I got the camera back they said they adjusted something but said they couldn’t find any problems with it, I wonder why you would adjust something when you didn’t find any problems and why would you send me 3 different cameras if there was no problems with them, they have my 7D now and I’m waiting to see what happens with this one I told them I want my money back because it’s worthless to send it back to me. IMHO it’s junk.