Hi all, Got a samsung galaxy tab 10 for christmas. Its great and i've had no problems except for when i tried to set the lock screen up. I went to Location and Security in the settings menu. It allows me to set a pattern or pin but when i try changing Off or 'Require pin/pattern' it just takes me back to 'Location and Security' without giving me the option to change anything. Am i missing something i need to do or is it a bug?