BRIDGE + IPFW : Unknown hardware address format 0x002

[Rajesh]

I some how make ipfw rule to set the tos bit for QOS. It is working fine 
except in bridging mode. When i set the rule, kernel generate the error

kernel: arp:Unknown hardware address format (0x002).
All the traffice get blocked. when i remove the rule then it is working fine.

This error is generated from the file if_ether.c. I think this is checksum 
problem.But i am not getting what is happening.

with regards

Rajesh