ipfilter 4.1.3 / pfil 2.1.4 Solaris 9 x86 bad ip checkcums

[Carson Gaspar]

We seem to be back to bogus checksum land with ipfilter 4.1.3. This is on 
the latest Solaris 9 x86, fully patched (Solaris 9 9/04 s9x_u7wos_09 x86, 
Generic_117172-11).

From tcpdump (on the ipfilter box itself, on the outgoing (nat'd) 
interface):
10:05:59.053533 IP (tos 0x0, ttl 127, id 25756, offset 0, flags [DF], 
length: 48, bad cksum 39a0 (->d702)!) 216.254.64.184.40007 > 
166.84.0.30.25: S [tcp sum ok] 3086311442:3086311442(0) win 16384 <mss 
1460,nop,nop,sackOK>

This is _with_ 'set ip:dohwcksum=0' in /etc/system.
It looks like it's the IP checksum that's bad, not the TCP checksum, if I'm 
reading my tcpdump correctly.

--
Carson Gaspar