Hi,
I am having the same issue with my HTC Rezound. I click on the camera icon, and it brings up a black screen for a split second, and then goes back to the apps menu. I have tried holding my finger and thumb over the rear and front camera, and unfortunately, that didn't work. I am unable to try the second option, (clicking on the "switch to front facing camera") because my camera doesn't stay open long enough to even click on that option.
This phone has not been modified in any way. It was purchased brand new at a Verizon store within the last two months. I've also tried to factory reset, and this doesn't help either. Any other suggestions, or should I just take it in to the store?
Thanks for any help!