RequireJS paths bug ?

gistfile1.js

// Configuration
require({
	baseUrl: 'js',
	paths: {
		'vendor/jquery.ui.widget':   'plugins/jquery.ui.widget'
// also tried   './vendor/jquery.ui.widget': 'plugins/jquery.ui.widget'
// and          'jquery.ui.widget':          'plugins/jquery.ui.widget'
	}
});

// This won't work
define(['./vendor/jquery.ui.widget']);

// This will work
define(['vendor/jquery.ui.widget']);