Jetpack Version 2.5 doesn't work with WP Version 3.7.1

Hello, I have installed the new WP release 3.7.1, and noticed still get a “Fatal Error” when using theme Twelve Twelve or any other, I go and click on the link of a the “Title” of a post, instead of its content, I get the following error message:

Fatal error: Call to undefined function mb_convert_encoding() in /home/paseosma/public_html/wp-content/plugins/jetpack/modules/gplus-authorship.php on line 67

I have uninstalled the Jetpack plugin again and it works normally there after.

I hope this helps to fix things on future WP Version 3.7.2.

Thanks