New Nehalem MacPro starts/shutsdown in verbose mode

Hello, I have a 10.5.7 image that I created with InstaDMG on a Macbook Pro. It works great on the macbook pro and a mac mini that I tested it on. But when I image a new Nehalem based MacPro, it starts and shutsdown in verbose mode. The system runs perfectly however, it's just very odd that it starts in verbose. Any idea how this might have happened, and any suggestions on a solution? Many thanks.