Merge branch 'master' into core-1.6.1

Conflicts:
	demos/menubar/default.html
	tests/unit/autocomplete/autocomplete.html
	tests/visual/effects/effects.all.html
	ui/jquery.ui.menu.js
	ui/jquery.ui.popup.js

1 files changed, 9 insertions, 5 deletions

diff --git a/ui/jquery.ui.widget.js b/ui/jquery.ui.widget.js
index 00bc07c4f..59d110b6a 100644
--- a/ui/jquery.ui.widget.js
+++ b/ui/jquery.ui.widget.js
@@ -133,7 +133,7 @@ $.widget.bridge = function( name, object ) {
 				}
 				var methodValue = instance[ options ].apply( instance, args );
 				if ( methodValue !== instance && methodValue !== undefined ) {
-					returnValue = methodValue.jquery ?
+					returnValue = methodValue && methodValue.jquery ?
 						returnValue.pushStack( methodValue.get() ) :
 						methodValue;
 					return false;
@@ -239,9 +239,6 @@ $.Widget.prototype = {
 		}
 
 		if ( typeof key === "string" ) {
-			if ( value === undefined ) {
-				return this.options[ key ];
-			}
 			// handle nested keys, e.g., "foo.bar" => { foo: { bar: ___ } }
 			options = {};
 			parts = key.split( "." );
@@ -252,8 +249,15 @@ $.Widget.prototype = {
 					curOption[ parts[ i ] ] = curOption[ parts[ i ] ] || {};
 					curOption = curOption[ parts[ i ] ];
 				}
-				curOption[ parts.pop() ] = value;
+				key = parts.pop();
+				if ( value === undefined ) {
+					return curOption[ key ] === undefined ? null : curOption[ key ];
+				}
+				curOption[ key ] = value;
 			} else {
+				if ( value === undefined ) {
+					return this.options[ key ] === undefined ? null : this.options[ key ];
+				}
 				options[ key ] = value;
 			}
 		}