Index: /Users/denis/Sites/sem-pro/wp-includes/js/thickbox/thickbox.js
===================================================================
--- /Users/denis/Sites/sem-pro/wp-includes/js/thickbox/thickbox.js	(revision 630)
+++ /Users/denis/Sites/sem-pro/wp-includes/js/thickbox/thickbox.js	(working copy)
@@ -8,6 +8,10 @@
 var tb_pathToImage = "../wp-includes/js/thickbox/loadingAnimation.gif";
 var tb_closeImage = "../wp-includes/js/thickbox/tb-close.png";
 
+jQuery.browser.msie6 = jQuery.browser.msie
+	&& parseInt(jQuery.browser.version) == 6
+	&& typeof this.XMLHttpRequest == 'undefined';
+
 /*!!!!!!!!!!!!!!!!! edit below this line at your own risk !!!!!!!!!!!!!!!!!!!!!!!*/
 
 //on page load call tb_init
@@ -282,7 +286,7 @@
 
 function tb_position() {
 jQuery("#TB_window").css({marginLeft: '-' + parseInt((TB_WIDTH / 2),10) + 'px', width: TB_WIDTH + 'px'});
-	if ( !(jQuery.browser.msie && jQuery.browser.version < 7)) { // take away IE6
+	if ( !jQuery.browser.msie6 ) { // take away IE6
 		jQuery("#TB_window").css({marginTop: '-' + parseInt((TB_HEIGHT / 2),10) + 'px'});
 	}
 }