Gtk::TreeSelection behaving strangely

[Jan Pfeifer <jan pfeifer yahoo com br>]

After I started using multiple selection with set_mode(Gtk::SELECTION_MULTIPLE) in my Gtk::TreeView (with a ListStore model behind), the Gtk::TreeSelection is behaving very strangely. 

The number of selected rows is different than those that are actually selected in the interface. Using the method TreeSelection::is_selected(iterator) also returns strange results: mark as selected some rows that are not in the interface, and fails to report others that were selected.

Any ideas what could be causing this ? I tried using the underlying gtk methods, with gtk_tree_view_get_selection() and gtk_tree_selection_count_selected_rows() but they also return strange results -- so I guess this is not an gtkmm specific question ...

thx,

- jan

ps.: I'm working on a Ubuntu 6.06 amd64