[Plugin: Twitter for WordPress] Getting strange code in pages

Using WPMU 2.8.4a.

Just installed this plug-in. Now when updating a page, this code snippet appears at the bottom of the page:

aktt_notify_twitter

The source code being produced is:

<ul class='post-meta'>
<li><span class='post-meta-key'>aktt_notify_twitter:</span> no</li>
</ul>

Anyone know what this is?

http://wordpress.org/extend/plugins/twitter-for-wordpress/