fixed #577

src/Node.js

@@ -94,6 +94,8 @@
         _getCache: function(attr, privateGetter){
             var cache = this.cache[attr];
 
+
+
             // if not cached, we need to set it using the private getter method.
             if (cache === undefined) {
                 this.cache[attr] = privateGetter.call(this);
@@ -530,10 +532,15 @@
          * @memberof Kinetic.Node.prototype
          */
         getAbsolutePosition: function() {
-            var absoluteTransform = this.getAbsoluteTransform(),
+            var absoluteMatrix = this.getAbsoluteTransform().getMatrix(),
+                absoluteTransform = new Kinetic.Transform(),
                 o = this.getOffset();
 
+            // clone the matrix array
+            absoluteTransform.m = absoluteMatrix.slice();
+
             absoluteTransform.translate(o.x, o.y);
+
             return absoluteTransform.getTranslation();
         },
         /**

src/Util.js

@@ -655,7 +655,7 @@
             }
             return retObj;
         },
-        // deep clone
+        // deep object clone
         _clone: function(obj) {
             var retObj = {};
             for(var key in obj) {

tests/js/unit/nodeTests.js

@@ -1467,6 +1467,37 @@ Test.Modules.NODE = {
         test(Math.round(rect.getAbsolutePosition().x) === 41, 'rect absolute position x should be about 41');
         test(Math.round(rect.getAbsolutePosition().y) === 92, 'rect absolute position y should be about 92');
     },
+    'test consecutive getAbsolutePositions()s when shape has offset': function(containerId) {
+        var stage = new Kinetic.Stage({
+            container: containerId,
+            width: 578,
+            height: 200
+        });
+        var layer = new Kinetic.Layer();
+        var rect = new Kinetic.Rect({
+            x: 200,
+            y: 20,
+            width: 100,
+            height: 50,
+            fill: 'red',
+            stroke: 'black',
+            strokeWidth: 4,
+            draggable: true,
+            offset: 30
+            //rotationDeg: 60
+            //rotationDeg: Math.PI / 3
+        });
+
+        layer.add(rect);
+        stage.add(layer);
+
+
+        test(rect.getAbsolutePosition().x === 200 && rect.getAbsolutePosition().y === 20, 'absolute position should be 200, 20');
+        test(rect.getAbsolutePosition().x === 200 && rect.getAbsolutePosition().y === 20, 'absolute position should be 200, 20');
+        test(rect.getAbsolutePosition().x === 200 && rect.getAbsolutePosition().y === 20, 'absolute position should be 200, 20');
+        test(rect.getAbsolutePosition().x === 200 && rect.getAbsolutePosition().y === 20, 'absolute position should be 200, 20');
+        test(rect.getAbsolutePosition().x === 200 && rect.getAbsolutePosition().y === 20, 'absolute position should be 200, 20');
+    },
     'test getPosition and getAbsolutePosition for transformed parent with center offset': function(containerId) {
         var side = 100;
         var diagonal = Math.sqrt(side * side * 2);