Merge branch 'master' of github.com:jquery/jquery

src/event.js

@@ -304,7 +304,7 @@ jQuery.event = {
 		}
 		event.namespace = namespaces.join(".");
 		event.namespace_re = new RegExp("(^|\\.)" + namespaces.join("\\.(?:.*\\.)?") + "(\\.|$)");
-		
+
 		// Handle a global trigger
 		if ( !elem ) {
 			// Don't bubble custom events when global (to avoid too much overhead)
@@ -574,6 +574,9 @@ jQuery.Event = function( src ) {
 			}
 		}
 
+		// Always ensure a type has been explicitly set
+		this.type = src.type;
+
 		// Events bubbling up the document may have been marked as prevented
 		// by a handler lower down the tree; reflect the correct value.
 		this.isDefaultPrevented = (src.defaultPrevented || src.returnValue === false ||
@@ -1030,10 +1033,18 @@ jQuery.each(["live", "die"], function( i, name ) {
 			return this;
 		}
 
+		if ( name === "die" && !types &&
+					origSelector && origSelector[0] === "." ) {
+
+			context.unbind( origSelector );
+
+			return this;
+		}
+
 		if ( data === false || jQuery.isFunction( data ) ) {
 			fn = data || returnFalse;
 			data = undefined;
-		}	
+		}
 
 		types = (types || "").split(" ");
 

src/traversing.js

@@ -73,9 +73,9 @@ jQuery.fn.extend({
 	},
 
 	is: function( selector ) {
-		return !!selector && (typeof selector === "string" ?
+		return !!selector && ( typeof selector === "string" ?
 			jQuery.filter( selector, this ).length > 0 :
-			this.filter( selector ).length > 0);
+			this.filter( selector ).length > 0 );
 	},
 
 	closest: function( selectors, context ) {
@@ -298,13 +298,18 @@ jQuery.extend({
 
 // Implement the identical functionality for filter and not
 function winnow( elements, qualifier, keep ) {
+
+	// Can't pass null or undefined to indexOf in Firefox 4
+	// Set to 0 to skip string check
+	qualifier = qualifier || 0;
+
 	if ( jQuery.isFunction( qualifier ) ) {
 		return jQuery.grep(elements, function( elem, i ) {
 			var retVal = !!qualifier.call( elem, i, elem );
 			return retVal === keep;
 		});
 
-	} else if ( qualifier && qualifier.nodeType ) {
+	} else if ( qualifier.nodeType ) {
 		return jQuery.grep(elements, function( elem, i ) {
 			return (elem === qualifier) === keep;
 		});