Rewriting images fails to load original image from alternative port

[GoogleCodeExporter]

What steps will reproduce the problem?
1. I'm running a version of apache under a proxy . The site is configured to 
port  localhost:8080
2. Image rewrite requests are going to just 127.0.0.1 instead of 127.0.0.1:8080 
3. See error below.

What is the expected output? What do you see instead?

Expect to 


What version of the product are you using (please check X-Mod-Pagespeed
header)?

[mod_pagespeed 0.9.8.1-215] http://127.0.0.1/stylesheets/base_7189.css:0: 
serf_context_run error status=111 (Connection refused)


On what operating system?

Ubuntu 

Which version of Apache?

2.29

Which MPM?

Worker

Please provide any additional information below, especially a URL or an
HTML file that exhibits the problem.

Original issue reported on code.google.com by john%[email protected] on 21 Nov 2010 at 9:43