nikhilbhuktar on "[Plugin: WordPress SEO by Yoast] Can't publish or save draft new posts"

Hello everyone, I'm using Wordpress SEO by Yoast plugin on my blog. After the latest update of plugin, It's generating following warning
Warning: preg_match() [function.preg-match]: Unknown modifier 'P' in /home/content/24/11019924/html/wp-content/plugins/wordpress-seo/admin/class-metabox.php on line 1690
Due to this I'm not able to save or publish any of the post untill I deactivated the plugin. Someone please help me to resolve this problem.

http://wordpress.org/extend/plugins/wordpress-seo/