dhclient: send_packet: No buffer space available

[Pertti Kosunen]

What could cause dhclient sometimes to fail renew the lease? I updated 
world and moved to pf from ipfw same time so i don't know which to blame.

This happens from twice a day to every few days.

Jul 21 03:44:55 myserver dhclient: send_packet: No buffer space available
Jul 21 03:44:55 myserver dhclient: send_packet: No buffer space available
Jul 21 03:45:02 myserver dhclient: New IP Address (xl0): x.x.x.x
Jul 21 03:45:02 myserver dhclient: New Subnet Mask (xl0): 255.255.254.0
Jul 21 03:45:02 myserver dhclient: New Broadcast Address (xl0): x.x.x.x
Jul 21 03:45:02 myserver dhclient: New Routers: x.x.x.x

Pf.conf & dmesg:
http://www.saunalahti.fi/~pkosunen/pf.conf
http://www.saunalahti.fi/~pkosunen/dmesg