Scott, Tom,
I am having a similar issue to this using fog Version 1.20.
I had an HP Elitebook that was not able to be registered at all. I updated the Kernal to the most recent bzImage files (posted on 2015-07-13) and then it booted into the screen to add the host but I got the “Invalid Mac Address Issue” (similar to this post): https://forums.fogproject.org/topic/4755/invalid-mac-address)
Wondering if I should try the update mentioned in this ticket or if this was something already built into 1.20. Any help would be greatly appreciated.
Thanks!