[Lynne]

If you look in the postbit_legacy template, you will see these lines where the message goes. That is the div tag I am talking about:

        <!-- message -->
        <div id="post_message_$post[postid]">
            $ad_location[ad_showthread_firstpost_start]
            $post[message]
        </div>
        <!-- / message -->

So, I'm suggesting you add some css into the div tag to put in your font - example:

<div id="post_message_$post[postid]" style="font: 12px arial,sans-serif;">