does anyone else have this problem? when the phone is locked and the screen is on, if you hold the search button down, it will still work and pick up whatever sounds are around and do a voice search. then when you unlock the phone, you will see the search. when the screen is off however, the search button does not work. i thought none of the buttons are supposed to work when the phone is locked (screen on and off)? is this a bug with the X?