You cannot place 2 "class" attributes in a a single div tag. This is what you currently have:
Code:
<!-- message -->
<div id="post_message_$post[postid]" class="satellite_postbit" class="hidemsg">$post[message]</div>
<!-- / message -->
If anything replace it with:
Code:
<!-- message -->
<div id="post_message_$post[postid]" class="satellite_postbit"><div class="hidemsg">$post[message]</div></div>
<!-- / message -->