Problem with update TinyMCE

Hello,

I have some problems with the update :

Warning: Missing argument 2 for wpdb::prepare(), called in public_html/…../wp-content/plugins/tinymce-signature/tinymce-signature.php on line 334 and defined in /public_html/……/wp-includes/wp-db.php on line 990

Warning: Cannot modify header information – headers already sent by (output started at /public_html/……./wp-includes/wp-db.php:990) in /public_html/……./wp-includes/pluggable.php on line 876

http://ww.wp.xz.cn/extend/plugins/tinymce-advanced/