Mobile – Footer Code Issue

In the footer of my mobile site: http://www.fauxwork.com, i’m getting broken code

Warning: stripos() [function.stripos]: needle is not a string or an integer in /home/content/39/10664639/html/wp-includes/functions.php on line 658

Warning: stripos() [function.stripos]: needle is not a string or an integer in /home/content/39/10664639/html/wp-includes/functions.php on line 661

Any help is appreciated, this is the only issue I’m running in to before turning site over to client. Thanks!

http://ww.wp.xz.cn/extend/plugins/easy-digital-downloads/