pos = len(uikit.idle_tasks)
        # Run callback right away
        if uikit.in_idle or conf.nothreads:
            log.UIKIT_RUN_NOW(name)
            callback(*args, **kwargs)
        # Spool them for Gtk idle handling
        else:
            #log.UIKIT_SPOOL(name)
            uikit.idle_tasks.insert(pos, [lambda: callback(*args, **kwargs), name])
            gobject.idle_add(uikit.idle_do)
    
    # Collect tasks to perform in gtk.main loop
    idle_tasks = []
    in_idle = False