After installing GB 4.5.588 and doing a factory reset, I began playing with the camera. I took a picture or two, switched to multi-shot mode, took a set of pictures, and now the camera doesn't work. When I bring it up, I get the camera menu and options, but the screen is black and I can't take a picure. Anyone experience anything similar? I'm within 14 days (today) so I could return if it's an actual defect. Thanks!