So here's a really weird situation . . . my loud camera noise went away all by itself - honest!
Before I read very far on the camera shutter issue, I tried the vignette app to see if it would disable the sound. No dice. I uninstalled it. A couple days later I noticed that when taking a photo there was no sound at all.
I have tried to change several settings to make the sound come back (just to figure out where it went), but I can't. I'm not complaining - the sound was terribly annoying! But, I'm a little worried that I can't figure out what happened.
And no, I'm not rooted.