diff --git a/src/css.js b/src/css.js
index 79ae00e3..4bf818e5 100644
--- a/src/css.js
+++ b/src/css.js
@@ -204,7 +204,7 @@ if ( !jQuery.support.opacity ) {
 
 			style.filter = ralpha.test(filter) ?
 				filter.replace(ralpha, opacity) :
-				opacity;
+				style.filter + ' ' + opacity;
 		}
 	};
 }
diff --git a/src/data.js b/src/data.js
index 66d24c42..732e9233 100644
--- a/src/data.js
+++ b/src/data.js
@@ -121,7 +121,7 @@ jQuery.extend({
 	// A method for determining if a DOM node can handle the data expando
 	acceptData: function( elem ) {
 		if ( elem.nodeName ) {
-			match = jQuery.noData[ elem.nodeName.toLowerCase() ];
+			var match = jQuery.noData[ elem.nodeName.toLowerCase() ];
 
 			if ( match ) {
 				return !(match === true || elem.getAttribute("classid") !== match);
diff --git a/test/unit/ajax.js b/test/unit/ajax.js
index 61992706..85c7380d 100644
--- a/test/unit/ajax.js
+++ b/test/unit/ajax.js
@@ -362,11 +362,11 @@ test("serialize()", function() {
 	);
 
 	equals( jQuery('#form').serialize(),
-		"action=Test&radio2=on&check=on&hidden=&foo%5Bbar%5D=&name=name&search=search&email=dave%40jquery.com&number=43&select1=&select2=3&select3=1&select3=2",
+		"action=Test&radio2=on&check=on&hidden=&foo%5Bbar%5D=&name=name&search=search&email=dave%40jquery.com&number=43&select1=&select2=3&select3=1&select3=2&select5=3",
 		'Check form serialization as query string');
 
 	equals( jQuery('#form :input').serialize(),
-		"action=Test&radio2=on&check=on&hidden=&foo%5Bbar%5D=&name=name&search=search&email=dave%40jquery.com&number=43&select1=&select2=3&select3=1&select3=2",
+		"action=Test&radio2=on&check=on&hidden=&foo%5Bbar%5D=&name=name&search=search&email=dave%40jquery.com&number=43&select1=&select2=3&select3=1&select3=2&select5=3",
 		'Check input serialization as query string');
 
 	equals( jQuery('#testForm').serialize(),
@@ -378,7 +378,7 @@ test("serialize()", function() {
 		'Check input serialization as query string');
 
 	equals( jQuery('#form, #testForm').serialize(),
-		"action=Test&radio2=on&check=on&hidden=&foo%5Bbar%5D=&name=name&search=search&email=dave%40jquery.com&number=43&select1=&select2=3&select3=1&select3=2&T3=%3F%0AZ&H1=x&H2=&PWD=&T1=&T2=YES&My+Name=me&S1=abc&S3=YES&S4=",
+		"action=Test&radio2=on&check=on&hidden=&foo%5Bbar%5D=&name=name&search=search&email=dave%40jquery.com&number=43&select1=&select2=3&select3=1&select3=2&select5=3&T3=%3F%0AZ&H1=x&H2=&PWD=&T1=&T2=YES&My+Name=me&S1=abc&S3=YES&S4=",
 		'Multiple form serialization as query string');
 
   /* Temporarily disabled. Opera 10 has problems with form serialization.
diff --git a/test/unit/css.js b/test/unit/css.js
index 8802fc00..468f7638 100644
--- a/test/unit/css.js
+++ b/test/unit/css.js
@@ -114,11 +114,14 @@ if(jQuery.browser.msie) {
 
     var filterVal = "progid:DXImageTransform.Microsoft.Alpha(opacity=30) progid:DXImageTransform.Microsoft.Blur(pixelradius=5)";
     var filterVal2 = "progid:DXImageTransform.Microsoft.alpha(opacity=100) progid:DXImageTransform.Microsoft.Blur(pixelradius=5)";
+    var filterVal3 = "progid:DXImageTransform.Microsoft.Blur(pixelradius=5)";
     jQuery('#foo').css("filter", filterVal);
     equals( jQuery('#foo').css("filter"), filterVal, "css('filter', val) works" );
-    jQuery('#foo').css("opacity", 1)
-    equals( jQuery('#foo').css("filter"), filterVal2, "Setting opacity in IE doesn't clobber other filters" );
-    equals( jQuery('#foo').css("opacity"), 1, "Setting opacity in IE with other filters works" )
+    jQuery('#foo').css("opacity", 1);
+    equals( jQuery('#foo').css("filter"), filterVal2, "Setting opacity in IE doesn't duplicate opacity filter" );
+    equals( jQuery('#foo').css("opacity"), 1, "Setting opacity in IE with other filters works" );
+    jQuery('#foo').css("filter", filterVal3).css("opacity", 1);
+    ok( jQuery('#foo').css("filter").indexOf(filterVal3) !== -1, "Setting opacity in IE doesn't clobber other filters" );
   });
 }