[dan.imbrogno]

Hi Andy, thanks for your quick response. I’ve identified the issue, it was really quite simple.

I built my theme of of the bpskeletonmember theme that was included with my download.

In the file messages/compose.php , the compose message form is:

<form action="<?php bp_messages_form_action('compose') ?>" method="post" id="send-message-form" class="standard-form">

When it should be

<form action="<?php bp_messages_form_action('compose') ?>" method="post" id="send_message_form" class="standard-form">

The subtle difference being, the form id having underscores instead of hyphens.