8.0 HF1 - "Unknown computer"

I just upgraded from 7.6 HF7 to 8.0 HF1; all the appropriate components are on the NS and site server. I have a scripted-install job that does this:

• Erase Disk
• Partition Disk
• Install Windows
• Boot to Production
• Join domain

Typically, to prepare a new computer, I add the MAC address and computer name to Predefined Computers, boot from a USB flash drive, select the scripted install from the Initial Deployment menu, and it's working.

Since going to 8.0 HF1, I get the "Unknown Computer" menu, even though the MAC address and computer name are listed in Predefined Computers. If I select a job and try to start it, the job never starts and it never shows up in the console.

Thoughts?

Thanks!