preg_match() [function.preg-match]: Unknown modifier 'N' plugins/wordpress-seo/a

I am getting similar problem started today:
Warning: preg_match() [function.preg-match]: Unknown modifier ‘2’ in /home4/lunsford/public_html/cincyshopper.com/wp-content/plugins/wordpress-seo/admin/class-metabox.php on line 1690

Warning: preg_match() [function.preg-match]: Unknown modifier ‘2’ in /home4/lunsford/public_html/cincyshopper.com/wp-content/plugins/wordpress-seo/admin/class-metabox.php on line 1690

Warning: Cannot modify header information – headers already sent by (output started at /home4/lunsford/public_html/cincyshopper.com/wp-content/plugins/wordpress-seo/admin/class-metabox.php:1690) in /home4/lunsford/public_html/cincyshopper.com/wp-includes/pluggable.php on line 876

Hi,

I’ll send a pull request to Yoast with the solution, hopefully it’ll make it into a next version of the plugin. In the mean time, you can solve it by changing line 1690 in file /wp-content/plugins/wordpress-seo/admin/class-metabox.php to:

if ( !preg_match('%\b'.$job['keyword'].'\b%', $firstp) && !preg_match('%\b'.$job['keyword_folded'].'\b%', $firstp) ) {

Smile,
Juliette