Index: Resources/Public/JavaScript/helpers.js
===================================================================
--- Resources/Public/JavaScript/helpers.js	(revision 3555)
+++ Resources/Public/JavaScript/helpers.js	(working copy)
@@ -49,6 +49,7 @@
 	},
 
 	getSendToStageWindow: function(configuration) {
+		top.TYPO3.Windows.close('sendToStageWindow');
 		return top.TYPO3.Windows.showWindow({
 			id: 'sendToStageWindow',
 			title: configuration.title,
Index: Resources/Public/JavaScript/toolbar.js
===================================================================
--- Resources/Public/JavaScript/toolbar.js	(revision 3559)
+++ Resources/Public/JavaScript/toolbar.js	(working copy)
@@ -127,6 +127,7 @@
 					label = TYPO3.lang["tooltip.releaseAll"];
 					break;
 			}
+			top.TYPO3.Windows.close('executeMassActionWindow');
 			var dialog = top.TYPO3.Windows.showWindow({
 				id: 'executeMassActionWindow',
 				title: TYPO3.lang["window.massAction.title"],