[Snipe]

в общем убирание embed не помогло

Сократил до

if (navigator.appName.indexOf("Microsoft") != -1) {
	var html_st = '<OBJECT classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" id="MyStorageSWF" name="MyStorageSWF" width="1" height="1">';
    html_st += '<PARAM name="movie" value="MyStorage.swf" />';
	html_st += '</OBJECT>';
  } else {
	var html_st = '<object type="application/x-shockwave-flash" id="MyStorageSWF" name="MyStorageSWF" data="MyStorage.swf" width="1" height="1"></object>'
  }
	var div_st = document.createElement('div');
	div_st.style.position = 'absolute';
	div_st.style.left = '-10px';
	div_st.style.top = '-10px';
	div_st.style.overflow = 'hidden';
	div_st.innerHTML = html_st;
	document.body.insertBefore(div_st, document.body.firstChild);
	movie = getMovie('MyStorageSWF');

Проблема с IE осталась