[squid-users] Return code 411 (Length required) for simple get

I'm having a problem with a vendor application trying to do a
simple get through my squid server (squid2.3Stable4), I highly suspect
it's a vendor issue, but I am looking for some backup here.

The request looks like:
HTTP: GET http://204.216.56.91/owa_ffw/owa/H.GetPI HTTP/1.0
HTTP: Accept: */*
HTTP: Host: 204.216.56.91
HTTP: Content-length: 0

The reply from squid is:
HTTP: HTTP/1.0 411 Length Required
HTTP: Server: Squid/2.3.STABLE4
HTTP: Mime-Version: 1.0
HTTP: Date: Wed, 20 Jun 2001 13:28:34 GMT
HTTP: Content-Type: text/html
HTTP: Content-Length: 843
HTTP: Expires: Wed, 20 Jun 2001 13:28:34 GMT
HTTP: X-Squid-Error: ERR_INVALID_REQ 0
HTTP: X-Cache: MISS from launchpad.wcpss.net
HTTP: Proxy-Connection: close
Received on Wed Jun 20 2001 - 07:45:31 MDT