diff --git a/lib/OpenLayers/Control/MouseDefaults.js b/lib/OpenLayers/Control/MouseDefaults.js
index 189b0f5165..bd62e729b0 100644
--- a/lib/OpenLayers/Control/MouseDefaults.js
+++ b/lib/OpenLayers/Control/MouseDefaults.js
@@ -12,7 +12,7 @@ OpenLayers.Control.MouseDefaults.prototype =
         this.map.events.register( "mousedown", this, this.defaultMouseDown );
         this.map.events.register( "mouseup", this, this.defaultMouseUp );
         this.map.events.register( "mousemove", this, this.defaultMouseMove );
-        //this.map.events.register( "mouseout", this, this.defaultMouseUp );
+        this.map.events.register( "mouseout", this, this.defaultMouseOut );
     },
     
     /**
@@ -33,10 +33,10 @@ OpenLayers.Control.MouseDefaults.prototype =
             this.zoomBox = OpenLayers.Util.createDiv('zoomBox');
             this.zoomBox.style.border = '2px solid red';
             this.zoomBox.style.backgroundColor = "white";
-            this.zoomBox.style.filter = "alpha(opacity=35)"; // IE
-            this.zoomBox.style.opacity = "0.35";
+            this.zoomBox.style.filter = "alpha(opacity=50)"; // IE
+            this.zoomBox.style.opacity = "0.50";
             this.zoomBox.style.position="absolute";
-            this.zoomBox.style.zIndex=1000;
+            this.zoomBox.style.zIndex = this.map.Z_INDEX_BASE["Popup"] - 1;
             this.zoomBox.style.top=this.mouseDragStart.y;
             this.zoomBox.style.left=this.mouseDragStart.x;
             this.map.viewPortDiv.appendChild(this.zoomBox);
@@ -97,7 +97,13 @@ OpenLayers.Control.MouseDefaults.prototype =
         }
         this.mouseDragStart = null;
         this.map.div.style.cursor = "default";
-    }
+    },
 
+    defaultMouseOut: function (evt) {
+        if (this.mouseDragStart != null
+            && OpenLayers.Util.mouseLeft(evt, this.map.div)) {
+                this.defaultMouseUp(evt);
+        }
+    }
 });