I have found recently that the camera app will often crash. Not even a force close it just disappears and returns to the home screen as if I pressed the home button. I have also had on at least 2 or 3 occasions the whole thing just fall apart and display a message saying it can't connect to the camera service (or something like this). The only way to get around this is to turn off the phone and reboot.
I do have my phone rooted running bugless beast and OC to 950mhz which could be the problem except that I have had this happen also before I rooted the phone.
The only thing I thought was that it first started when I copied the 2.1 gallery ap (without rooting) so maybe the problem is with the gallery somehow.