no need to root
I lost the ability to turn off shutter sound too with the JB 4.1.2 upgrade on my Samsung Note. Turning vibrate on kills the shutter sound but the extra steps are a pain.
I found a solution that takes this back to one click on the camera icon - the E-Robot extension for the Elixir app.
I set up an E-Robot command to turn vibrate on when the camera app gets focus and another command to turn vibrate off when the camera app stops or loses focus.
Works like a charm - one click and no shutter sound as long as E-Robot is running.