I would go back and demand a refund and/or exchange for the correct mount, because we have a wall-mounted flat panel in our bedroom right now and paid $800 for the TV and another $100 for the wall mount, so I'll be darned if we don't get the right one and that TV falls on me, it's too expensive to risk, IMO!

And yes, you MUST MUST MUST MUST make sure to find a stud... otherwise you may wake up to a surprise