diff --git a/demos/dialog/animated.html b/demos/dialog/animated.html
index 0d74662ee..14a0fd7c9 100644
--- a/demos/dialog/animated.html
+++ b/demos/dialog/animated.html
@@ -5,7 +5,7 @@
 	<title>jQuery UI Dialog - Animation</title>
 	<link rel="stylesheet" href="../../themes/base/jquery.ui.all.css">
 	<script src="../../jquery-1.4.2.js"></script>
-	<script src="../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script src="../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script src="../../ui/jquery.ui.core.js"></script>
 	<script src="../../ui/jquery.ui.widget.js"></script>
 	<script src="../../ui/jquery.ui.mouse.js"></script>
diff --git a/demos/dialog/default.html b/demos/dialog/default.html
index df38c7127..d28a6ba04 100644
--- a/demos/dialog/default.html
+++ b/demos/dialog/default.html
@@ -5,7 +5,7 @@
 	<title>jQuery UI Dialog - Default functionality</title>
 	<link rel="stylesheet" href="../../themes/base/jquery.ui.all.css">
 	<script src="../../jquery-1.4.2.js"></script>
-	<script src="../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script src="../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script src="../../ui/jquery.ui.core.js"></script>
 	<script src="../../ui/jquery.ui.widget.js"></script>
 	<script src="../../ui/jquery.ui.mouse.js"></script>
diff --git a/demos/dialog/modal-confirmation.html b/demos/dialog/modal-confirmation.html
index bed319a95..b08c1a76a 100644
--- a/demos/dialog/modal-confirmation.html
+++ b/demos/dialog/modal-confirmation.html
@@ -5,7 +5,7 @@
 	<title>jQuery UI Dialog - Modal confirmation</title>
 	<link rel="stylesheet" href="../../themes/base/jquery.ui.all.css">
 	<script src="../../jquery-1.4.2.js"></script>
-	<script src="../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script src="../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script src="../../ui/jquery.ui.core.js"></script>
 	<script src="../../ui/jquery.ui.widget.js"></script>
 	<script src="../../ui/jquery.ui.mouse.js"></script>
diff --git a/demos/dialog/modal-form.html b/demos/dialog/modal-form.html
index b008a8cf9..b700a68ba 100644
--- a/demos/dialog/modal-form.html
+++ b/demos/dialog/modal-form.html
@@ -5,7 +5,7 @@
 	<title>jQuery UI Dialog - Modal form</title>
 	<link rel="stylesheet" href="../../themes/base/jquery.ui.all.css">
 	<script src="../../jquery-1.4.2.js"></script>
-	<script src="../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script src="../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script src="../../ui/jquery.ui.core.js"></script>
 	<script src="../../ui/jquery.ui.widget.js"></script>
 	<script src="../../ui/jquery.ui.mouse.js"></script>
diff --git a/demos/dialog/modal-message.html b/demos/dialog/modal-message.html
index 18e84e87d..24518006a 100644
--- a/demos/dialog/modal-message.html
+++ b/demos/dialog/modal-message.html
@@ -5,7 +5,7 @@
 	<title>jQuery UI Dialog - Modal message</title>
 	<link rel="stylesheet" href="../../themes/base/jquery.ui.all.css">
 	<script src="../../jquery-1.4.2.js"></script>
-	<script src="../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script src="../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script src="../../ui/jquery.ui.core.js"></script>
 	<script src="../../ui/jquery.ui.widget.js"></script>
 	<script src="../../ui/jquery.ui.mouse.js"></script>
diff --git a/demos/dialog/modal.html b/demos/dialog/modal.html
index 1664bd1a6..551926473 100644
--- a/demos/dialog/modal.html
+++ b/demos/dialog/modal.html
@@ -5,7 +5,7 @@
 	<title>jQuery UI Dialog - Basic modal</title>
 	<link rel="stylesheet" href="../../themes/base/jquery.ui.all.css">
 	<script src="../../jquery-1.4.2.js"></script>
-	<script src="../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script src="../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script src="../../ui/jquery.ui.core.js"></script>
 	<script src="../../ui/jquery.ui.widget.js"></script>
 	<script src="../../ui/jquery.ui.mouse.js"></script>
diff --git a/demos/index.html b/demos/index.html
index fa6215878..1a383cc7a 100644
--- a/demos/index.html
+++ b/demos/index.html
@@ -6,7 +6,7 @@
 	<link rel="stylesheet" href="../themes/base/jquery.ui.all.css">
 	<link rel="stylesheet" href="demos.css">
 	<script src="../jquery-1.4.2.js"></script>
-	<script src="../external/jquery.bgiframe-2.1.1.js"></script>
+	<script src="../external/jquery.bgiframe-2.1.2.js"></script>
 	<script src="../ui/jquery.ui.core.js"></script>
 	<script src="../ui/jquery.ui.widget.js"></script>
 	<script src="../ui/jquery.ui.mouse.js"></script>
diff --git a/external/jquery.bgiframe-2.1.1.js b/external/jquery.bgiframe-2.1.1.js
deleted file mode 100644
index ef8679d90..000000000
--- a/external/jquery.bgiframe-2.1.1.js
+++ /dev/null
@@ -1,10 +0,0 @@
-/* Copyright (c) 2006 Brandon Aaron (http://brandonaaron.net)
- * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) 
- * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
- *
- * $LastChangedDate: 2007-07-21 18:45:56 -0500 (Sat, 21 Jul 2007) $
- * $Rev: 2447 $
- *
- * Version 2.1.1
- */
-(function($){$.fn.bgIframe=$.fn.bgiframe=function(s){if($.browser.msie&&/6.0/.test(navigator.userAgent)){s=$.extend({top:'auto',left:'auto',width:'auto',height:'auto',opacity:true,src:'javascript:false;'},s||{});var prop=function(n){return n&&n.constructor==Number?n+'px':n;},html='<iframe class="bgiframe"frameborder="0"tabindex="-1"src="'+s.src+'"'+'style="display:block;position:absolute;z-index:-1;'+(s.opacity!==false?'filter:Alpha(Opacity=\'0\');':'')+'top:'+(s.top=='auto'?'expression(((parseInt(this.parentNode.currentStyle.borderTopWidth)||0)*-1)+\'px\')':prop(s.top))+';'+'left:'+(s.left=='auto'?'expression(((parseInt(this.parentNode.currentStyle.borderLeftWidth)||0)*-1)+\'px\')':prop(s.left))+';'+'width:'+(s.width=='auto'?'expression(this.parentNode.offsetWidth+\'px\')':prop(s.width))+';'+'height:'+(s.height=='auto'?'expression(this.parentNode.offsetHeight+\'px\')':prop(s.height))+';'+'"/>';return this.each(function(){if($('> iframe.bgiframe',this).length==0)this.insertBefore(document.createElement(html),this.firstChild);});}return this;};})(jQuery);
\ No newline at end of file
diff --git a/external/jquery.bgiframe-2.1.2.js b/external/jquery.bgiframe-2.1.2.js
new file mode 100644
index 000000000..5cd38bb1d
--- /dev/null
+++ b/external/jquery.bgiframe-2.1.2.js
@@ -0,0 +1,39 @@
+/*! Copyright (c) 2010 Brandon Aaron (http://brandonaaron.net)
+ * Licensed under the MIT License (LICENSE.txt).
+ *
+ * Version 2.1.2
+ */
+
+(function($){
+
+$.fn.bgiframe = ($.browser.msie && /msie 6\.0/i.test(navigator.userAgent) ? function(s) {
+    s = $.extend({
+        top     : 'auto', // auto == .currentStyle.borderTopWidth
+        left    : 'auto', // auto == .currentStyle.borderLeftWidth
+        width   : 'auto', // auto == offsetWidth
+        height  : 'auto', // auto == offsetHeight
+        opacity : true,
+        src     : 'javascript:false;'
+    }, s);
+    var html = '<iframe class="bgiframe"frameborder="0"tabindex="-1"src="'+s.src+'"'+
+                   'style="display:block;position:absolute;z-index:-1;'+
+                       (s.opacity !== false?'filter:Alpha(Opacity=\'0\');':'')+
+                       'top:'+(s.top=='auto'?'expression(((parseInt(this.parentNode.currentStyle.borderTopWidth)||0)*-1)+\'px\')':prop(s.top))+';'+
+                       'left:'+(s.left=='auto'?'expression(((parseInt(this.parentNode.currentStyle.borderLeftWidth)||0)*-1)+\'px\')':prop(s.left))+';'+
+                       'width:'+(s.width=='auto'?'expression(this.parentNode.offsetWidth+\'px\')':prop(s.width))+';'+
+                       'height:'+(s.height=='auto'?'expression(this.parentNode.offsetHeight+\'px\')':prop(s.height))+';'+
+                '"/>';
+    return this.each(function() {
+        if ( $(this).children('iframe.bgiframe').length === 0 )
+            this.insertBefore( document.createElement(html), this.firstChild );
+    });
+} : function() { return this; });
+
+// old alias
+$.fn.bgIframe = $.fn.bgiframe;
+
+function prop(n) {
+    return n && n.constructor === Number ? n + 'px' : n;
+}
+
+})(jQuery);
\ No newline at end of file
diff --git a/tests/unit/dialog/dialog.html b/tests/unit/dialog/dialog.html
index f2e47b978..46c189e48 100644
--- a/tests/unit/dialog/dialog.html
+++ b/tests/unit/dialog/dialog.html
@@ -7,7 +7,7 @@
 	<link type="text/css" href="../../../themes/base/jquery.ui.dialog.css" rel="stylesheet" />
 
 	<script type="text/javascript" src="../../../jquery-1.4.2.js"></script>
-	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.core.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.widget.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.mouse.js"></script>
diff --git a/tests/visual/dialog/dialog.html b/tests/visual/dialog/dialog.html
index 31ffda0b0..b0a301219 100644
--- a/tests/visual/dialog/dialog.html
+++ b/tests/visual/dialog/dialog.html
@@ -6,7 +6,7 @@
 	<link rel="stylesheet" href="../visual.css" type="text/css" />
 	<link rel="stylesheet" href="../../../themes/base/jquery.ui.all.css" type="text/css">
 	<script type="text/javascript" src="../../../jquery-1.4.2.js"></script>
-	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.core.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.widget.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.mouse.js"></script>
diff --git a/tests/visual/dialog/dialog_on_page_with_large_dom.html b/tests/visual/dialog/dialog_on_page_with_large_dom.html
index 92f03eb5b..30fc5af65 100644
--- a/tests/visual/dialog/dialog_on_page_with_large_dom.html
+++ b/tests/visual/dialog/dialog_on_page_with_large_dom.html
@@ -6,7 +6,7 @@
 	<link rel="stylesheet" href="../visual.css" type="text/css" />
 	<link rel="stylesheet" href="../../../themes/base/jquery.ui.all.css" type="text/css">
 	<script type="text/javascript" src="../../../jquery-1.4.2.js"></script>
-	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.core.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.widget.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.draggable.js"></script>
diff --git a/tests/visual/dialog/dialog_on_page_with_scrollbars.html b/tests/visual/dialog/dialog_on_page_with_scrollbars.html
index a43ee6e42..fd30c6bcd 100644
--- a/tests/visual/dialog/dialog_on_page_with_scrollbars.html
+++ b/tests/visual/dialog/dialog_on_page_with_scrollbars.html
@@ -6,7 +6,7 @@
 	<link rel="stylesheet" href="../visual.css" type="text/css" />
 	<link rel="stylesheet" href="../../../themes/base/jquery.ui.all.css" type="text/css">
 	<script type="text/javascript" src="../../../jquery-1.4.2.js"></script>
-	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.core.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.widget.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.draggable.js"></script>
diff --git a/tests/visual/dialog/dialog_option_buttons_OK_Cancel.html b/tests/visual/dialog/dialog_option_buttons_OK_Cancel.html
index d51186039..287ffa6fa 100644
--- a/tests/visual/dialog/dialog_option_buttons_OK_Cancel.html
+++ b/tests/visual/dialog/dialog_option_buttons_OK_Cancel.html
@@ -6,7 +6,7 @@
 	<link rel="stylesheet" href="../visual.css" type="text/css" />
 	<link rel="stylesheet" href="../../../themes/base/jquery.ui.all.css" type="text/css">
 	<script type="text/javascript" src="../../../jquery-1.4.2.js"></script>
-	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.core.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.widget.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.draggable.js"></script>
diff --git a/tests/visual/dialog/dialog_option_closeOnEscape_false.html b/tests/visual/dialog/dialog_option_closeOnEscape_false.html
index 681cc3c65..5c5cb9c5f 100644
--- a/tests/visual/dialog/dialog_option_closeOnEscape_false.html
+++ b/tests/visual/dialog/dialog_option_closeOnEscape_false.html
@@ -6,7 +6,7 @@
 	<link rel="stylesheet" href="../visual.css" type="text/css" />
 	<link rel="stylesheet" href="../../../themes/base/jquery.ui.all.css" type="text/css">
 	<script type="text/javascript" src="../../../jquery-1.4.2.js"></script>
-	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.core.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.widget.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.draggable.js"></script>
diff --git a/tests/visual/dialog/dialog_option_closeOnEscape_true.html b/tests/visual/dialog/dialog_option_closeOnEscape_true.html
index c05cb5251..88bcb50fb 100644
--- a/tests/visual/dialog/dialog_option_closeOnEscape_true.html
+++ b/tests/visual/dialog/dialog_option_closeOnEscape_true.html
@@ -6,7 +6,7 @@
 	<link rel="stylesheet" href="../visual.css" type="text/css" />
 	<link rel="stylesheet" href="../../../themes/base/jquery.ui.all.css" type="text/css">
 	<script type="text/javascript" src="../../../jquery-1.4.2.js"></script>
-	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.core.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.widget.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.draggable.js"></script>
diff --git a/tests/visual/dialog/dialog_option_modal_false.html b/tests/visual/dialog/dialog_option_modal_false.html
index 43829ae38..316a0cf75 100644
--- a/tests/visual/dialog/dialog_option_modal_false.html
+++ b/tests/visual/dialog/dialog_option_modal_false.html
@@ -6,7 +6,7 @@
 	<link rel="stylesheet" href="../visual.css" type="text/css" />
 	<link rel="stylesheet" href="../../../themes/base/jquery.ui.all.css" type="text/css">
 	<script type="text/javascript" src="../../../jquery-1.4.2.js"></script>
-	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.core.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.widget.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.draggable.js"></script>
diff --git a/tests/visual/dialog/dialog_option_modal_true.html b/tests/visual/dialog/dialog_option_modal_true.html
index dcebd5a65..c941f7b23 100644
--- a/tests/visual/dialog/dialog_option_modal_true.html
+++ b/tests/visual/dialog/dialog_option_modal_true.html
@@ -6,7 +6,7 @@
 	<link rel="stylesheet" href="../visual.css" type="text/css" />
 	<link rel="stylesheet" href="../../../themes/base/jquery.ui.all.css" type="text/css">
 	<script type="text/javascript" src="../../../jquery-1.4.2.js"></script>
-	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.core.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.widget.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.draggable.js"></script>
diff --git a/tests/visual/dialog/dialog_option_position_right_top.html b/tests/visual/dialog/dialog_option_position_right_top.html
index d30e19011..dde1a700d 100644
--- a/tests/visual/dialog/dialog_option_position_right_top.html
+++ b/tests/visual/dialog/dialog_option_position_right_top.html
@@ -6,7 +6,7 @@
 	<link rel="stylesheet" href="../visual.css" type="text/css" />
 	<link rel="stylesheet" href="../../../themes/base/jquery.ui.all.css" type="text/css">
 	<script type="text/javascript" src="../../../jquery-1.4.2.js"></script>
-	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.core.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.widget.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.draggable.js"></script>
diff --git a/tests/visual/dialog/dialog_ticket_4350.html b/tests/visual/dialog/dialog_ticket_4350.html
index 67279754e..528ef887c 100644
--- a/tests/visual/dialog/dialog_ticket_4350.html
+++ b/tests/visual/dialog/dialog_ticket_4350.html
@@ -6,7 +6,7 @@
 	<link rel="stylesheet" href="../visual.css" type="text/css" />
 	<link rel="stylesheet" href="../../../themes/base/jquery.ui.all.css" type="text/css">
 	<script type="text/javascript" src="../../../jquery-1.4.2.js"></script>
-	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.core.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.widget.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.mouse.js"></script>
diff --git a/tests/visual/dialog/dialog_ticket_4826.html b/tests/visual/dialog/dialog_ticket_4826.html
index 29b2337ce..edccfac90 100644
--- a/tests/visual/dialog/dialog_ticket_4826.html
+++ b/tests/visual/dialog/dialog_ticket_4826.html
@@ -6,7 +6,7 @@
 	<link rel="stylesheet" href="../visual.css" type="text/css" />
 	<link rel="stylesheet" href="../../../themes/base/jquery.ui.all.css" type="text/css">
 	<script type="text/javascript" src="../../../jquery-1.4.2.js"></script>
-	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.core.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.widget.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.draggable.js"></script>
diff --git a/tests/visual/menu/nested.html b/tests/visual/menu/nested.html
index 063b946c7..114d314f8 100644
--- a/tests/visual/menu/nested.html
+++ b/tests/visual/menu/nested.html
@@ -9,7 +9,7 @@
 	<script type="text/javascript" src="../../../ui/jquery.ui.widget.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.position.js"></script>
 	<script type="text/javascript" src="../../../ui/jquery.ui.autocomplete.js"></script>
-	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.1.js"></script>
+	<script type="text/javascript" src="../../../external/jquery.bgiframe-2.1.2.js"></script>
 	<script type="text/javascript" src="http://jqueryui.com/themeroller/themeswitchertool/"></script>
 	<script type="text/javascript">
 	$(function() {