FireBug and virtual host

In Firebug I keep getting a message when I try to view my scripts:

Failed to load source for: http://catalogue.roadrunnerrecords.com.au/js/site.js

catalogue.roadrunnerrecords.com.au is setup as a virtual host on my local machine, and is working correctly as far as I can tell (ie. the page is loading and all resources). If I navigate to the URL http://catalogue.roadrunnerrecords.com.au/js/site.js the file opens correctly.

Is ther开发者_JS百科e an issue with using FireBug and virtual hosts together?