Stop End button from unlocking the phone

[menion]

I recently bought a new belt case for the omnia (a verizon droid case, perfect fit) but have ran into an annoying problem that I just can't find a solution for.

In the last 2 weeks, my phone has called people about 6 times on its own. The end key is getting pressed down in the case sometimes when I sit, bend over, etc and unlocking the phone, then the dial gets pressed and away it goes.

How can I turn this off? Holding down 'End' should not unlock the phone. Pressing 'unlock' and then 'unlock' again on the screen is the only way I want to unlock it.

Thanks!