Index: offset.js
===================================================================
--- offset.js	(revision 5917)
+++ offset.js	(working copy)
@@ -17,9 +17,13 @@
 		if ( !(mozilla && elem == document.body) && elem.getBoundingClientRect ) {
 			var box = elem.getBoundingClientRect();
 
-			// Add the document scroll offsets
-			add(box.left + Math.max(doc.documentElement.scrollLeft, doc.body.scrollLeft),
-				box.top  + Math.max(doc.documentElement.scrollTop,  doc.body.scrollTop));
+			// MSIE getBoundingClientRect on the HTML element already has the document scroll offsets added.
+			if (!jQuery.browser.msie || !elem.nodeName || elem.nodeName.toLowerCase()!='html')
+			{
+				// Add the document scroll offsets
+				add(box.left + Math.max(doc.documentElement.scrollLeft, doc.body.scrollLeft),
+					box.top  + Math.max(doc.documentElement.scrollTop,  doc.body.scrollTop));
+			}
 
 			// IE adds the HTML element's border, by default it is medium which is 2px
 			// IE 6 and 7 quirks mode the border width is overwritable by the following css html { border: 0; }