Comment 15 for bug 145405

Ok I figure out it bit.
In Ubuntu 10.04 apparmor is responsible for not allowing to run dhclient with option -cf pointing to /var/lib/wicd/dhclient.conf.

Maybe wicd should run dhclient with default config file for dhcp3 client - /etc/dhcp3/dhclient.conf.

I don't understand why wicd creates it's own dhclinet.conf and try to used it.

Another options here is to write rules for apparmor (/etc/apparmor.d/sbin.dhclient3) with appropriate entries for wicd.