diff --git a/doc/bugs/Running_on_an_alternative_port_fails.mdwn b/doc/bugs/Running_on_an_alternative_port_fails.mdwn
index 8b5fefa91..ca835cb59 100644
--- a/doc/bugs/Running_on_an_alternative_port_fails.mdwn
+++ b/doc/bugs/Running_on_an_alternative_port_fails.mdwn
@@ -6,6 +6,8 @@ For example if you run on 'http://my.gear.xxx:8080/' then after clicking login (
 
 NB: both the 'url' and the 'cgiurl' include the port and removing the port element provides the expected functionality.
 
+---
+
 > I tried to reproduce this by making my laptop's web server use port
 > 8080. Set up ikiwiki to use that in cgiurl and url, and had
 > no problem with either openid or password auth login.
@@ -14,3 +16,35 @@ NB: both the 'url' and the 'cgiurl' include the port and removing the port eleme
 > what version you were using. It could also be a problem with your web
 > server, conceviably, if didn't correctly communicate the port to the cgi
 > program. --[[Joey]]
+
+---
+
+>> I did think of that so threw a 'printenv' script to check the port was arriving 
+right.
+
+>>>     SERVER_PORT=8181  
+>>>     HTTP_HOST=zippy0.ie0.cobbled.net  
+>>>     HTTP_ACCEPT_LANGUAGE=en-ie, en  
+>>>     PATH=/usr/local/bin:/usr/ucb:/bin:/usr/bin  
+>>>     SCRIPT_NAME=/cgi-bin/printenv.sh  
+>>>     HTTP_USER_AGENT=Mozilla/5.0 (X11; U; Linux i686; en-ie) AppleWebKit/531.2+ (KHTML, like Gecko) Version/5.0 Safari/531.2+ Ubuntu/10.10 () Epiphany/2.30.2  
+>>>     PWD=/home/http1/www/cgi-bin  
+>>>     REQUEST_METHOD=GET  
+>>>     SERVER_SOFTWARE=thttpd
+>>>     SERVER_NAME=zippy0  
+>>>     SERVER_PROTOCOL=HTTP/1.1  
+>>>     HTTP_ACCEPT_ENCODING=gzip  
+>>>     GATEWAY_INTERFACE=CGI/1.1  
+>>>     CGI_PATTERN=cgi-bin/*  
+>>>     HTTP_COOKIE=ikiwiki_session_c%5E2%3Fsupport%3Dtrue=bdf13df0460966a607ba497967ea5ff4  
+>>>     REMOTE_ADDR=10.0.0.1  
+>>>     HTTP_ACCEPT=application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5  
+
+>>Seems to be.  Using version from packaging system;
+
+>>>     ikiwiki-3.20110905
+
+>> which I'd guess is from Apr last  year.  Will look for updates and post back if still
+wrong.
+>> Cheers
+>> -- fergus