wpmhweb on "[Plugin: Jetpack by WordPress.com] Error deleting feedbacks contact form JetPack"

I'm getting this error trying to move to trash some old feedback messages from the contact form tool in JetPack.

Warning: Cannot modify header information - headers already sent by (output started at /home/wp-content/plugins/jetpack/modules/contact-form/grunion-contact-form.php:379) in /home/wp-includes/pluggable.php on line 875

Version 2.3.3

http://wordpress.org/plugins/jetpack/