Update build

dist/leaflet.markercluster-src.js

@@ -428,16 +428,27 @@ L.MarkerClusterGroup = L.FeatureGroup.extend({
 		};
 
 		if (layer._icon && this._map.getBounds().contains(layer.getLatLng())) {
+			//Layer is visible ond on screen, immediate return
 			callback();
 		} else if (layer.__parent._zoom < this._map.getZoom()) {
-			//Layer should be visible now but isn't on screen, just pan over to it
+			//Layer should be visible at this zoom level. It must not be on screen so just pan over to it
 			this._map.on('moveend', showMarker, this);
 			this._map.panTo(layer.getLatLng());
 		} else {
+			var moveStart = function () {
+				this._map.off('movestart', moveStart, this);
+				moveStart = null;
+			};
+
+			this._map.on('movestart', moveStart, this);
 			this._map.on('moveend', showMarker, this);
 			this.on('animationend', showMarker, this);
-			this._map.setView(layer.getLatLng(), layer.__parent._zoom + 1);
 			layer.__parent.zoomToBounds();
+
+			if (moveStart) {
+				//Never started moving, must already be there, probably need clustering however
+				showMarker.call(this);
+			}
 		}
 	},
 
@@ -846,7 +857,7 @@ L.MarkerClusterGroup = L.FeatureGroup.extend({
 		//Incase we are starting to split before the animation finished
 		this._processQueue();
 
-		if (this._zoom < this._map._zoom && this._currentShownBounds.contains(this._getExpandedVisibleBounds())) { //Zoom in, split
+		if (this._zoom < this._map._zoom && this._currentShownBounds.intersects(this._getExpandedVisibleBounds())) { //Zoom in, split
 			this._animationStart();
 			//Remove clusters now off screen
 			this._topClusterLevel._recursivelyRemoveChildrenFromMap(this._currentShownBounds, this._zoom, this._getExpandedVisibleBounds());
@@ -1135,7 +1146,7 @@ L.MarkerCluster = L.Marker.extend({
 			mapZoom = map.getZoom(),
 			i;
 
-		//calculate how fare we need to zoom down to see all of the markers
+		//calculate how far we need to zoom down to see all of the markers
 		while (childClusters.length > 0 && boundsZoom > zoom) {
 			zoom++;
 			var newClusters = [];