Comment 2 for bug 733822

StacktraceTop:
 g_type_check_instance_is_a (type_instance=0x209ebf60, iface_type=546770824) at /build/buildd/glib2.0-2.28.2/./gobject/gtype.c:3961
 xfdesktop_icon_get_extents (icon=0x209ebf60, pixbuf_extents=0x0, text_extents=0x0, total_extents=0xbf92a460) at xfdesktop-icon.c:170
 xfdesktop_icon_view_invalidate_icon (icon_view=0x2098e1a8, icon=0x209ebf60, recalc_extents=0) at xfdesktop-icon-view.c:2370
 xfdesktop_icon_view_focus_in (widget=0x2098e0a8, evt=0x20b1c640, user_data=0x2098e1a8) at xfdesktop-icon-view.c:870
 _gtk_marshal_BOOLEAN__BOXED (closure=0x209ad158, return_value=0xbf92a604, n_param_values=2, param_values=0x20afb340, invocation_hint=0xbf92a5f0, marshal_data=0x246a80) at /build/buildd/gtk+2.0-2.24.1/gtk/gtkmarshalers.c:86