Perl HTTP::Recorder Module Throws Content Encoding Error - perl

Question

I am running Ubuntu 12.04 and am trying to record http requests with perl's HTTP::Recorder module. I am following the instructions here: http://metacpan.org/pod/HTTP::Recorder
I have the following perl script running:
#!/usr/bin/perl
use HTTP::Proxy;
use HTTP::Recorder;
my $proxy = HTTP::Proxy->new();
# create a new HTTP::Recorder object
my $agent = new HTTP::Recorder;
# set the log file (optional)
$agent->file("/tmp/myfile");
# set HTTP::Recorder as the agent for the proxy
$proxy->agent( $agent );
# start the proxy
$proxy->start();
And I have changed firefox settings so that it uses port 8080 on the localhost as the proxy. Here is a snapshot of my settings:
When I try to visit a website with firefox, however, I get the following error:
Content Encoding Error
The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression.
Not sure what to do. And when I visit:
http://http-recorder
(Where my recorded activity is supposed to show up) I do see that GET requests are being logged. For example, if I try to visit google:
$agent->get('http://www.google.com');
Edit: I should also mention that ubuntu is running inside of virtualbox, not sure if that is messing with anything.