Cmd line arguments for single instance xulrunner application

Hi All,

we need to read the _last_ command line arguments passed to the application.

Since the application is a singleton I tried to follow the second part 
of the tutorial available here:

https://developer.mozilla.org/en/XULRunner/CommandLine

It doesn't seem to work - the Observer is notified only once at the 
first launch of the application.

We are wondering if the issue can be related to the changes introduced 
in Gecko 2.0 about the registration of XPCOM components:

https://developer.mozilla.org/en/XPCOM/XPCOM_changes_in_Gecko_2.0


Any suggestion will be much appreciated.

Guido.