RouteConverter and Mac OS X

[routeconverter]

Of course - that's related to problem with the unreachable port. Something is blocking the web browser (I guess it's a Web Kit-based component) to direct AJAX-calls to the port from the RouteConverter process.

I found out, what the for this behaviour is: the error is NS_ERROR_DOM_BAD_URI and the cause is the same origin policy that changed between XUL Runner 1.8 and 1.9 as explained here.