Selector state wasn't being passed along on a cloned jQuery object.

src/core.js

@@ -73,6 +73,12 @@ jQuery.fn = jQuery.prototype = {
 		} else if ( jQuery.isFunction( selector ) )
 			return jQuery( document ).ready( selector );
 
+		// Make sure that old selector state is passed along
+		if ( selector.selector && selector.context ) {
+			this.selector = selector.selector;
+			this.context = selector.context;
+		}
+
 		return this.setArray(jQuery.makeArray(selector));
 	},
 

test/unit/core.js

@@ -53,7 +53,7 @@ test("jQuery()", function() {
 });
 
 test("selector state", function() {
-	expect(26);
+	expect(28);
 
 	var test;
 	
@@ -80,6 +80,11 @@ test("selector state", function() {
 	test = jQuery("#main", document.body);
 	equals( test.selector, "#main", "#main Selector" );
 	equals( test.context, document.body, "#main Context" );
+
+	// Test cloning
+	test = jQuery(test);
+	equals( test.selector, "#main", "#main Selector" );
+	equals( test.context, document.body, "#main Context" );
 	
 	test = jQuery(document.body).find("#main");
 	equals( test.selector, "#main", "#main find Selector" );