swfobject 2.1 Issue in FireFox 3 on Mac

I embedded my swf (XML-powered AS3 slideshow) using swfobject 2.1 and it looks fine in IE7/FF3/Safari/Opera 9 on Windows and Safari/Opera 9 on Mac. FireFox 3 on Mac displays the first image correctly but does not display the thumbnails or the prev/next buttons on the bottom. But if I navigate to another page and click Back, it works fine. This seems to be a bug with FF3 on Mac. Anyone else encounter this or have a workaround?

You can take a look at it here:
http://www.creativemess.com/rockpress/gallery2

And here is my HTML code:
Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Image Gallery</title>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
		<script type="text/javascript" src="swfobject.js"></script>
		<script type="text/javascript">
			var flashvars = {};
			flashvars.xmlPath = "xml/images.xml";
			var params = {};
			params.menu = "false";
			var attributes = {};
			swfobject.embedSWF("gallery.swf", "flashDiv", "750", "550", "9.0.0", "expressInstall.swf", flashvars, params, attributes);
		</script>
<style type="text/css">
<!--
body { background-color: #999999; margin:0; text-align:center; }
div#content { text-align:left; }
object#content { display:inline; }
-->
</style></head>
<body>
	<p>&nbsp;</p>
	<p>&nbsp;</p>
	<div id="flashDiv">
		<p><a href="http://www.adobe.com/go/getflashplayer"><img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player" />
	    </a>        </p>
	</div>
</body>
</html>