Do not send model change event source object as json to server
diff --git a/bundles/org.eclipse.rap.addons.dropdown.viewer/js/rwt/remote/Model.js b/bundles/org.eclipse.rap.addons.dropdown.viewer/js/rwt/remote/Model.js
index bd0631f..8953aa2 100644
--- a/bundles/org.eclipse.rap.addons.dropdown.viewer/js/rwt/remote/Model.js
+++ b/bundles/org.eclipse.rap.addons.dropdown.viewer/js/rwt/remote/Model.js
@@ -69,7 +69,7 @@
       var properties = useMap ? arguments[ 0 ].properties : arguments[ 1 ];
       var nosync = useMap ? arguments[ 0 ].nosync : false;
       if( !nosync ) {
-        rap.getRemoteObject( this ).notify( event, properties );
+        notifyRemote( this, event, properties );
       }
       notifyInternal( this, event, properties );
     },
@@ -114,4 +114,16 @@
     }
   };
 
+  var notifyRemote = function( model, type, properties ) {
+    var propCopy = {};
+    for( var key in properties ) {
+      if( properties[ key ] && properties[ key ]._rwtId ) {
+        propCopy[ key ] = properties[ key ]._rwtId;
+      } else {
+        propCopy[ key ] = properties[ key ];
+      }
+    }
+    rap.getRemoteObject( model ).notify( type, propCopy );
+  };
+
 }());
diff --git a/tests/org.eclipse.rap.addons.dropdown.test/js/rwt/remote/Model_Test.js b/tests/org.eclipse.rap.addons.dropdown.test/js/rwt/remote/Model_Test.js
index 38bd30d..f2a22b2 100644
--- a/tests/org.eclipse.rap.addons.dropdown.test/js/rwt/remote/Model_Test.js
+++ b/tests/org.eclipse.rap.addons.dropdown.test/js/rwt/remote/Model_Test.js
@@ -57,6 +57,15 @@
       assertEquals( "bar", message.findNotifyProperty( "r11", "Selection", "foo" ) );
     },
 
+    testNotify_ReplacesProtocolObjectsWithId : function() {
+      TestUtil.protocolListen( "r11", { "Selection" : true } );
+
+      model.notify( "Selection", { "foo" : model } );
+
+      var message = TestUtil.getMessageObject();
+      assertEquals( "r11", message.findNotifyProperty( "r11", "Selection", "foo" ) );
+    },
+
     testNotify_CallWithParameterMap : function() {
       TestUtil.protocolListen( "r11", { "Selection" : true } );