I was trying the "File Explorer" example and noticed these errors in the console window of the IDE. The example seemed to run fine. (Explorer:11523): Gtk-CRITICAL **: IA__gtk_widget_hide: assertion `GTK_IS_WIDGET (widget)' failed ** (Explorer:11523): CRITICAL **: os_pager_set_parent: assertion `OS_IS_PAGER (pager)' failed