dhclient problems on FreeBSD-6

I'm running:  6.0-BETA5 #0: Sat Oct  8 14:41:44 EDT 2005

Recently, I posted a quesiton about dhclient becoming "wedged" in the 
mornings, it would raise the system load and basically hang.   A simple 
kill -HUP and restart would solve the problem.

The only indication I'm seeing in the logs is:

    Oct 20 13:25:26 forrie dhclient[11061]: 5 bad IP checksums seen in 5
    packets


My provider is Comcast.   Does the above message indicate something 
"bad" being sent from their DHCP servers or am I hitting a known bug.

The dhclient I'm using is whatever comes with the stock system build.


Thanks.