al final lo cambié a la mala a otro div ... con otros no funcionaba, ahora se ve bien en todos... :S....
<div id="logo_bg">
<script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,28,0','width','985','heigh t','370','title','Flash head','src','images/stories/HomeTopBanner','quality','high','pluginspage','htt p://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash','movi e','images/stories/HomeTopBanner' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,28,0" width="985" height="370" title="Flash head">
<param name="movie" value="images/stories/HomeTopBanner.swf" />
<param name="quality" value="high" />
<embed src="images/stories/HomeTopBanner.swf" quality="high" pluginspage="http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" width="985" height="370"></embed>
</object></noscript>