iPad2 mute/screen-lock switch glitch!
Just in case anyone is getting these in, here's something I found that could produce a head-scratch moment if one of the kids managed to do it and you had to fix it;
Go into settings, and the option for the rotation-lock or mute-lock switch is set to rotation lock. So, lock the screen by putting the switch in the down position. Now, change the setting in the menu so that the switch operates the mute/un-mute instead. Switch the switch on/off to toggle the mute, but whatever you do the screen stays in the locked position!
If you do it the other way around, the sound stays muted (even if you use the volume control buttons in the side of the pad!) and you can lock/unlock the screen with the switch.