Error: uncaught exception: Permission denied to call method XMLHttpRequest.open

Error: uncaught exception: Permission denied to call method XMLHttpRequest.open:

" If the page with the XMLHttpRequest is on a http:// URI (on a webserver), it is not possible to fetch data from another domain!!! This is a security measure of Mozilla/Firefox. Still, it comes in handy, if you can read remote data from a local application. E.g. you've got a local XUL application that needs to get data from other servers - Dude! Sweet! :-)"

The bane of my web 2.0 existance.