Index: Resources/Private/Templates/Preview/Preview.html
===================================================================
--- Resources/Private/Templates/Preview/Preview.html	(revision 3682)
+++ Resources/Private/Templates/Preview/Preview.html	(working copy)
@@ -1,19 +1,47 @@
 <script type="text/javascript">
-	document.domain =  '{backendDomain}';
 
 		// @todo redirect to split module if this is opened standalone
 
-		// make sure we're in the workspace preview module 
-	if (typeof parent.resize == 'function') {
-		parent.resize(
-			Math.max(
-				Math.max(document.body.scrollHeight, document.documentElement.scrollHeight),
-				Math.max(document.body.offsetHeight, document.documentElement.offsetHeight),
-				Math.max(document.body.clientHeight, document.documentElement.clientHeight)
-			)
-		);
+		// having this is very important, otherwise the parent.resize call will fail
+	document.domain = '{backendDomain}';
 
-		var element = document.getElementById('typo3-previewInfo');
-		element.parentNode.removeChild(element);
+	var asNumber = function(val) {
+		return isNaN(val) ? 0 : parseInt(val, 10);
+	};
+
+	var TYPO3 = {};
+	TYPO3.ready = function () {
+		// make sure we're in the workspace preview module
+		if (typeof parent.resize == 'function') {
+				// try to find the height of the document
+			var docHeight = Math.max(
+				asNumber(window.innerHeight),
+				asNumber(document.height),
+				asNumber(document.body.scrollHeight),
+				asNumber(document.body.offsetHeight),
+				asNumber(document.body.clientHeight),
+				asNumber(document.documentElement.scrollHeight),
+				asNumber(document.documentElement.offsetHeight),
+				asNumber(document.documentElement.clientHeight)
+			);
+
+			parent.resize(docHeight);
+				// remove the ugly red box if we're in the ws-repview frames
+			var element = document.getElementById('typo3-previewInfo');
+			element.parentNode.removeChild(element);
+		}
+	};
+		// trigger this after content is loaded, inspired by jQuery
+	if (document.addEventListener && !/opera/.test(navigator.userAgent.toLowerCase())) {
+		document.addEventListener("DOMContentLoaded", TYPO3.ready, false);
+	} else {
+		(function() {
+			if (document.readyState != "loaded" && document.readyState != "complete") {
+				setTimeout(arguments.callee, 10);
+			} else {
+				TYPO3.ready();
+			}
+		})();
 	}
-</script>
+
+</script>
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