I'm sifting through the NetBoot logs for clues, in the mean time one of our NetBoot servers is being moved to the server room so it's connecting directly to the switch (proper segment of course).
Has anyone seen this strange "throbbing" (as it was described to me over the phone) icon, when holding OPTION key at reboot (since holding N does not work)?
Once the NetBoot server is moved and I have access to the NetBoot logs, I'll have more info, sorry for posting early without the expected details... :)