If you used Absinthe 2.0 to do untethered jailbreak on iOS 5.1.1, then you know for sure that in LockScreen you have permanently displayed a button that allows you to unlock the camera of your iDevices more easily. Apple decided that users should have easier access to this application, so starting with iOS 5.1.1 it is no longer necessary to double-press the Home button to activate the button that opens the camera from the LockScreen. Of course, many people were not satisfied with Apple's decision, so NoCameraGrabber appeared in Cydia, which permanently hides that button from the LockScreen.
The problem with this tweak is that hiding that button does not lead to an extension of the iDevice unlock slider, so your lockscreen will look pretty ugly after you install it. NoCameraGrabber is available for free in Cydia and only works on iOS 5.1.x.
