OK, maybe it'll help. I run alacarte from the command line and when I click "Properties" on Firefox icon, I get this:
(gnome-desktop-item-edit:7970): Gtk-CRITICAL **: gtk_tree_model_get_iter_first: assertion `GTK_IS_TREE_MODEL (tree_model)' failed ** ** ERROR:(panel-ditem-editor.c:757):panel_ditem_editor_setup_ui: code should not be reached
OK, maybe it'll help. I run alacarte from the command line and when I click "Properties" on Firefox icon, I get this:
(gnome- desktop- item-edit: 7970): Gtk-CRITICAL **: gtk_tree_ model_get_ iter_first: assertion `GTK_IS_TREE_MODEL (tree_model)' failed panel-ditem- editor. c:757): panel_ditem_ editor_ setup_ui: code should not be reached
**
** ERROR:(