Panel applet: Menu missing + problems debugging

Asked this question on gnome-list@xxxxxxxxx, but no response yet, so I 
thought I might try here:

I have developed an GNOME 2 panel applet (or rather, ported it from GNOME 
1) that works mostly fine, but the right-click menu isn't displayed. The 
code I'm using to add the menu is included below (there will actually be 
more buttons, but I'm trying the simple case first.) Can anyone find 
anything wrong with it? Also the main reason why I can't get it to work is 
that I don't know how to debug a panel applet. What can I do if I want to 
display debug output from it, or run it through a debugger?


  static const BonoboUIVerb menuVerbs[] = {
    BONOBO_UI_VERB("IntranetAbout", about),
    BONOBO_UI_VERB_END
  };

  static const char menu[]="<Root>\n"
    "  <popups>\n"
    "    <popup name=\"button3\">\n"
    "      <menuitem name=\"about\" verb=\"IntranetAbout\" 
label=\"About...\"\n"
    "                pixtype=\"stock\" pixname=\"gnome-stock-about\"/>\n"
    "    </popup>\n"
    "  </popups>\n"
    "</Root>\n";
    panel_applet_setup_menu(PANEL_APPLET(applet), menu, menuVerbs, 
applet);


--
- Toralf