Index: typo3/backend.php
===================================================================
--- typo3/backend.php	(revision 3408)
+++ typo3/backend.php	(working copy)
@@ -97,6 +97,7 @@
 			'js/sizemanager.js',
 			'js/toolbarmanager.js',
 			'js/modulemenu.js',
+			'js/iecompatibility.js',
 			'../t3lib/jsfunc.evalfield.js'
 		);
 
Index: typo3/js/iecompatibility.js
===================================================================
--- typo3/js/iecompatibility.js	(revision 3408)
+++ typo3/js/iecompatibility.js	(working copy)
@@ -24,6 +24,40 @@
 *  This copyright notice MUST APPEAR in all copies of the script!
 ***************************************************************/
 
+Element.addMethods({
+	pngHack: function(el) {
+
+		var el = $(el);
+		var transparentGifPath = 'clear.gif';;
+
+		if(el.src.endsWith('.png')) {
+				/* if it's an img and a png */
+			var alphaImgSrc = el.src;
+			var sizingMethod = 'scale';
+			el.src = transparentGifPath;
+		} else if(el.getStyle('background-image').include('png')) {
+				/* if it's an element with a background png */
+			var bgColor = '';
+			if (el.getStyle('background-color')) {
+				bgColor = el.getStyle('background-color') + ' ';
+			}
+			var elBg = el.getStyle('background-image');
+			var alphaImgSrc = elBg.slice(5, elBg.length - 2);
+			var sizingMethod = 'crop';
+			el.setStyle({ 'background': bgColor + transparentGifPath });
+		}
+
+		if(alphaImgSrc) {
+			el.runtimeStyle.filter = 'progid:DXImageTransform.Microsoft.AlphaImageLoader(src="#{alphaImgSrc}",sizingMethod="#{sizingMethod}")'.interpolate(
+			{
+				alphaImgSrc: alphaImgSrc,
+				sizingMethod: sizingMethod
+			});
+		}
+
+		return el;
+	}
+});
 
 var IECompatibility = Class.create({
 
@@ -34,9 +68,18 @@
 		Event.observe(document, 'dom:loaded', function() {
 			$$('input[type="checkbox"]').invoke('addClassName', 'checkbox');
 		}.bind(this));
+
+		Event.observe(window, 'load', function() {
+			if(/MSIE 6/.test(navigator.userAgent)) {
+				$$('img').each(function(img){
+					img.pngHack();
+				});
+				$('treeFilterBox').pngHack();
+			}
+		});
 	}
 });
 
-if (Prototype.Browser.IE) {
+if(Prototype.Browser.IE) {
 	var TYPO3IECompatibilty = new IECompatibility();
 }
Index: typo3/stylesheet.css
===================================================================
--- typo3/stylesheet.css	(revision 3410)
+++ typo3/stylesheet.css	(working copy)
@@ -879,7 +879,9 @@
 	top: 22px;
 	width: 260px;
 	height: 27px;
-	background: url('gfx/filter_bg.png') no-repeat 2px -2px;
+	background-repeat: no-repeat;
+	background-position:  2px -2px;
+	background-image: url('gfx/filter_bg.png');
 }
 
 #searchBubble {