                     @listenTo marker, 'click', @select_marker
                     return marker
             @all_markers.addLayers markers
-            @all_markers.on 'clustermouseover', (e) =>
-                @highlight_unselected_cluster e.layer
-            @all_markers.on 'mouseover', (e) =>
-                @highlight_unselected_unit e.layer.unit
 
         draw_unit: (unit, units, options) ->
             location = unit.get('location')

                maxClusterRadius: 30
                iconCreateFunction: (cluster) =>
                    @create_cluster_icon(cluster)
            @popups = new L.layerGroup()

            L.control.zoom(

            # try to get the initial location now.
            if p13n.get_location_requested()
                p13n.request_location()

        _add_mouseover_listeners: (markerClusterGroup)->
            markerClusterGroup.on 'clustermouseover', (e) =>
                @highlight_unselected_cluster e.layer
            markerClusterGroup.on 'mouseover', (e) =>
                @highlight_unselected_unit e.layer.unit

        effective_horizontal_center: ->
            sidebar_edge = @navigation_layout.right_edge_coordinate()
