Firebug shows all but I can't expand the fieldset in the firebug window

Thanks for a great module.

But it appears to not be happy with something.

OS: Centos 5
Firefox 3.01
Firebug 1.2.1
DrupalForFirebug 0.0.4

Running EVERYTHING on my local workstation (Apache,PHP, Firefox), I see everything in the firebug window. The Drupal tab is there and when I select it all the tabs are there.

However, if I navigate to a page that lists nodes and then select the drupal tab and then the drupal->nodes menu, I get a list below of collapsed fieldsets- one per node- which is good. BUT I can't expand them! Same for forms,users, and views. The only thing that works is the Execute PHP function.

Now firebug works fine, it is only the drupal functions that don't seem to work properly.

Thanks!
Dave