Your new machine won't be able to boot an older version of 10.6 than it shipped with, so yes, that's your problem.

Neal Costello
ICT officer
DPEM Tas.

Hi Andrew,

It's funny how when I work late I see Australia posts come in. :)

If the OS you're NetBooting off of is older than the OS that shipped with the Mac, all bets are off. We always create a new NetBoot image when new hardware is released. This way it'll boot the new hardware, and it's backwards compatible so it'll boot older hardware that is compatible with the OS. Our NetBoot image is now at 10.6.4 (10F2521). You'll also need to update your BaseImage and Restore image as well.

http://jamfsoftware.com/kb/article.php?id=236

Don

We typically have NetBoot running a flavor of a pre-released OS point release. Right now it is running an early 10.6.5 release so that we can boot the mid-2010 MacPros and iMacs without issue.

j
--
Jared F. Nichols
Desktop Engineer, Client Services
Information Services Department
MIT Lincoln Laboratory
244 Wood Street
Lexington, Massachusetts 02420
781.981.5436