[Plugin: Cool Video Gallery] link to shadowbox.css causes validation problem

Which Cool Video Gallery file inserts this line into a page: <link rel="stylesheet" type="text/css" href="http://essiacherbtea.com/wp-content/plugins/cool-video-gallery/cvg-player/shadowbox.css">

It does not close the tag and my page will not validate.

Thanks

http://ww.wp.xz.cn/extend/plugins/cool-video-gallery/