Comment 1 for bug 327533

I'm not a GTK or c++ expert, but could it be related to that line?

toolbox.cpp, line 4548:
gtk_list_store_set( model, &iter, 0, preset_name.data(), 1, ii++, -1 );

Other lists (which are all ok) are not populated with an iteration, but directly with _("text") strings.