Firefox/Gecko requires .css stylesheet extensions? - Teh Forum

<body> <div id="header"> <span class="left"> <span class="back"><a href="lthread_list.php?webtag=DEFAULT"><span class="image mobile_back" title="Back"></span></a></span> <span class="image mobile_logo" title="Beehive Forum Logo"></span> </span> <ul> <li> <a class="reply_all" href="lpost.php?webtag=DEFAULT&reply_to=34111.0&return_msg=34111.9"> <span class="image mobile_reply_all"></span><span class="text">Reply to All</span> </a> </li> <li> <a class="navigation" href="#"> <span class="image mobile_navigation"></span><span class="text">Show messages</span> </a> </li> <li> <a class="main" href="#"><span class="image mobile_menu" title="Menu"></span> </a> </li> </ul> </div> <div class="menu main"> <ul> <li><a href="lthread_list.php?webtag=DEFAULT">Messages</a></li> <li><a href="lpm.php?webtag=DEFAULT">Inbox</a></li> <li><a href="lsearch.php?webtag=DEFAULT">Search</a></li> <li><a href="llogon.php?webtag=DEFAULT">Login</a></li> </ul> </div> <div class="menu navigation"><a href="lmessages.php?webtag=DEFAULT&msg=34111.1">1–9</a></div> <div id="page_content"> <h3 class="thread_title"><a href="index.php?webtag=DEFAULT&amp;msg=34111.9">Firefox/Gecko requires .css stylesheet extensions?</a> </h3> <div id="messages" data-navigation="34111_9_9_10"> <a name="a34111_9"></a><div class="message" id="message_34111_9"> <div class="message_header"> <div class="message_from"> From: THERE IS NO GOD BUT (RENDLE)<span class="message_time">24 Mar 2008 18:12</span> <div class="clearer"></div> </div><div class="message_to">To: Peter (BOUGHTONP) <span><span class="image post_read" title="Read: 24 Mar 2008 18:19"></span></span> <span class="message_count">9 of 9</span><div class="clearer"></div> </div> </div> <div class="message_links"> <a href="lmessages.php?webtag=DEFAULT&msg=34111.9">34111.9</a> In reply to <a href="lmessages.php?webtag=DEFAULT&msg=34111.7">34111.7</a></div> <div class="message_body"> That was an excellent example of asking the wrong question. Well done. </div> <div class="message_footer"> <div class="message_footer_links"><a href="lpost.php?webtag=DEFAULT&reply_to=34111.9&return_msg=34111.9" class="reply"><span class="image post"></span>Reply</a></div> <div class="message_vote_form" data-msg="34111.9"> <span class="rating">0/0</span> <span class="image vote vote_down vote_down_off" title="Vote Down"></span> <span class="image vote vote_up vote_up_off" title="Vote Up"></span> </div> </div> </div></div> </div> </body>