MY camera continues to suck, it still will not focus via shop savvy. It will now take photos and auto-focus but not barcodes. It also makes the clicking noise, I think I will exchange it.
Give it a day or so. Moto just pushed out a silent OTA camera fix, so that should resolve 90-100% of the camera problems you may have been having. I know I'm seeing the green corners 100% of the time now, and I'm pretty stoked about it. If your camera is still not working later today or tomorrow, definitely exchange it.