(Also reported to the bug catcher.) I'm trying to migrate from ZopeHTTPServer to ZServer 1.0b1. I was seeing the ZServer headers turning up in pages generated by the process. When I viewed the page source of the generated HTML I saw: HTTP/1.0: 200 OK Server: Zope/experimental ZServer/1.1b1 Date: Wed, 21 Apr 1999 13:00:38 GMT X-Powered-By: Zope (www.zope.org), Python (www.python.org) Connection: close Content-Type: text/html Content-Length: 7802 <!-- -*-html-helper -*- --> <HTML> <HEAD> <TITLE>Musi-Cal... Concert Schedules: Folk Music, Country Music, Rock Music & more!</TITLE> ... I run ZServer behind an Apache 1.3.3 running mod_proxy. Apparently Apache doesn't recognize the HTTP response when there is a colon following the version number and adds a simple set of headers itself. I guess web browsers either ignore that line or are more lenient in their parsing of the response. The following simple patch corrects the problem: diff -c2 HTTPResponse.py.~1~ HTTPResponse.py *** HTTPResponse.py.~1~ Tue Apr 13 15:21:12 1999 --- HTTPResponse.py Wed Apr 21 09:05:00 1999 *************** *** 146,150 **** # status header must come first. ! append("HTTP/%s: %s" % (self._http_version, status)) if headers.has_key('status'): del headers['status'] --- 146,150 ---- # status header must come first. ! append("HTTP/%s %s" % (self._http_version, status)) if headers.has_key('status'): del headers['status'] *************** Skip Montanaro | Mojam: "Uniting the World of Music" http://www.mojam.com/ skip@mojam.com | Musi-Cal: http://www.musi-cal.com/ 518-372-5583