Same situation, but on GPe rom.
I'm kind of in the same situation.
I'm running the GPe rom, and flashed the moto camera, then the stock camera, and then the moto camera (just trying things out). (See: modaco.com/topic/368504-mod-aosp-camera-and-gallery/ ) ~can't post links yet...
Once upon a time the moto camera worked fine, but now everything works as described in the OP, apart from taking a picture, where upon I get the 'Unfortunately, camera has stopped', and a FC.
Flashing the ASOP camera again works perfectly, but I prefer the moto one, if it is possible to get it working?