Comment 12 for bug 38140

Same bug here, running Ubuntu Server 7.04 with latest updates installed. After reconfiguring eth0 from dynamic to static and performing ifdown eth0/ifup eth0 dhclient3 is still running and keeps mangling interface address later on. I also notice the following error message in /var/log/daemons.log

Sep 8 20:18:43 xxxxx dhclient: can't create /var/lib/dhcp3/dhclient.eth0.leases: Permission denied

and this is indeed impossible since dhclient3 runs under dhcp user while:

ls -lh /var/lib/dhcp3/
total 0
-rw-r--r-- 1 root root 0 2007-09-09 16:08 dhclient.eth0.leases

(unless of course dhclient3 can somehow elevate its state back to root for performing operations on the lease files)

I am surprised this bug has not been fixed yet after many months. I am also surprised it is marked as of Medium importance. I believe it is a blocker.