We recently upgraded from NW6.5 SP5 to SP6 and now we see these messages
on the serverconsole running DHCP.
We also get duplicate IP-address objects in the DNS/DHCP management
The duplicate ojects in the tree look like collision objects like 129_12
the workaround is to stop the DHCP server and delete the duplicate entries
and then restart the DHCP server.

What could be causing this?, I have searched the internet and it seems to
heve something to do with eDirectory synchronisation, but I am unable to
find anything wrong.