Update build

dist/leaflet.markercluster-src.js

@@ -125,13 +125,14 @@ L.MarkerClusterGroup = L.FeatureGroup.extend({
 
 	//Takes an array of markers and adds them in bulk
 	addLayers: function (layersArray) {
+		var i, l, m;
 		if (!this._map) {
 			this._needsClustering = this._needsClustering.concat(layersArray);
 			return this;
 		}
 
-		for (var i = 0, l = layersArray.length; i < l; i++) {
+		for (i = 0, l = layersArray.length; i < l; i++) {
-			var m = layersArray[i];
+			m = layersArray[i];
 
 			if (this.hasLayer(m)) {
 				continue;
@@ -148,6 +149,17 @@ L.MarkerClusterGroup = L.FeatureGroup.extend({
 				}
 			}
 		}
+
+		//Update the icons of all those visible clusters that were affected
+		for (i in this._layers) {
+			if (this._layers.hasOwnProperty(i)) {
+				m = this._layers[i];
+				if (m instanceof L.MarkerCluster && m._iconNeedsUpdate) {
+					m._updateIcon();
+				}
+			}
+		}
+
 		this._topClusterLevel._recursivelyAddChildrenToMap(null, this._zoom, this._currentShownBounds);
 
 		return this;
@@ -1715,6 +1727,11 @@ L.MarkerCluster.include(!L.DomUtil.TRANSITION ? {
 		for (i = childMarkers.length - 1; i >= 0; i--) {
 			m = childMarkers[i];
 
+			//Marker was added to us after we were spidified
+			if (!m._preSpiderfyLatlng) {
+				continue;
+			}
+
 			//Fix up the location to the real one
 			m.setLatLng(m._preSpiderfyLatlng);
 			delete m._preSpiderfyLatlng;