void HandleItemProvidersChanged (object o, ItemProvidersChangedEventArgs args)
		{
			RefreshDocklets ();
		}
		void PreferencesItemProvidersChanged (object sender, ItemProvidersChangedEventArgs e)
		{
			foreach (AbstractDockItemProvider provider in e.AddedProviders)
				RegisterItemProvider (provider);
			foreach (AbstractDockItemProvider provider in e.RemovedProviders)
				UnregisterItemProvider (provider);
			UpdateCollectionBuffer ();
			AnimatedDraw ();
		}