Help with strange web server problem

[Jerry Bell]

It's hit or miss, but the first time someone visits the web site, they get
a "server not found" page.  On hitting refresh, they get the page - no
problems.  If I wait a while and try again, I get the same problem.

The problem appears to be something in the initial communication with the
web server.  Using tcpdump, I can see that the PC connects to the web
server and sends the GET request, but the server closes the connection
abruptly.  Comparing that flow to a normal session, I see that there are
some extra packets between the initial SYN and the sending of the GET
phrase that do not exist during a successful session.

I'm running 5.4-STABLE FreeBSD 5.4-STABLE #0: Thu Aug 18 (built from the
stable source as of that day).
I'm using apache 1.3.34.  I was on 1.3.33 and rebuilt the port to see if
that was the problem.

I'm not sure if this is an apache problem or a FreeBSD problem.  Any
suggestions on further troubleshooting or known issues?

Thank you!

Jerry