NetBoot is grey in Server Admin

This problem really annoyed me. Sometimes my NetBoot administration pane in Server Admin would be marked with a grey bubble and I'd be unable to edit my NetBoot settings. DNS and DHCP are on other non-Apple servers so my Xserve only supplies BSDP and NFS. I may or may not have found the "silver bullet" for the "grey bubble": The problem seems to related to NFS and a reboot usually fixes it. One of the things that happen during reboot is that the /System/Library/StartupItems/NFS/NFS script is run. Now one the things it does it to wipe the /var/db/mountdtab file. Upon closer inspection I found that my /var/db/mountdtab file contained an export to a named host. All other hosts were designated by ip adresses. Sure enough the hostname could not be resolved via DNS. So I did the following: 1) delete the line for the offendig host in /var/db/mountdtab (or alternately the entire file. No clue what this does to running clients though) 2) in the Terminal do: [code]sudo killall -9 nfsd-master; sudo killall -9 nfsd-server;sudo kill -s HUP `cat /var/run/mountd.pid`;[/code] The "kill -9"ing seems a bit excessive but for me it works and the grey bubble is green again. I hope this helps others