I've already logged well over a thousand pics on this thing and I've only hit a couple of FCs and hangs... it's been rock steady. The issue might not be with the camera app itself, but with the camera sub-system. Give Pro Shot or Manual Camera a look though, maybe they'll work out.
Have you tried anything to clear the issue? Clear the app data and cache on the Camera app? Have you done a factory reset at any point, etc?