Open up the camera app. Press the menu button (at the bottom of the phone). Press the gear on the menu that opens up. This is the camera settings menu. Scroll all the way down to the bottom. There is a setting there called "shutter tone". Just unchecked the box next to it and that disables the camera sound.
Sent from my A500 using xda premium
Guide for XT910 ICS uses
You have 2 be rooted.
1. Go to system/build.prop
2. Edit build.prop (I'm using Root Explorer)
3. Go to ro.camera.sound.forced=1
4. Replace 1 and put 0 ( ro.camera.sound.forced=0)
5. Save it
7. Now go to camera settings, and switch of the sound