PHP Notice

Minor bug. Your code triggers php notice. ( turn on WP_DEBUG and you will see )

Change this:

add_options_page(
	'Redirects',
	'Redirects',
	10,
	$this->slug,
	array($this, 'options')
);

to:

add_options_page(
	'Redirects',
	'Redirects',
	'administrator',
	$this->slug,
	array($this, 'options')
);

Great little plugin!

http://ww.wp.xz.cn/extend/plugins/redirects/