in_cksum_skip messages and network performance

Hello,

as of -CURRENT July 2nd 2004 - 16:00 +- I'm seeing a large number of
'in_cksum_skip: out of data by <NUMBER>' messages. Prior to this update, I
had never seen these before. This is a router system with 2 interfaces fxp
and dc drivers (fxp external, dc internal). pf is the firewall/nat utility
in use. ipfilter was tested, ULE and 4BSD tested, same results. Network
performance (i.e. high latency when accessing the router via SSH, poor
internet access et al.) has been observed since the update. This is a UP
system.

Any thoughts/more info required?

Thanks,