Apple revealed a minor tweak to the iPad hardware when preorders began Friday morning, with a button previously designated for audio muting changed to a "screen rotation lock." As first noticed by Jim ...

The Apple iPad's screen orientation rotates depending on how the device is held, the screen turning from a landscape view to a horizontal view as necessary to maintain optimal visibility. Users may ...

As has been widely reported, 4.2 apparently turns the switch on the side of the iPad from a screen rotation lock into a mute switch. Not having 4.2 myself, I can't comment on my direct experience with ...