By default the drop-down temporarily hides objects (like Flash) that intersect with the menu when the menu is displayed. This is done to overcome browser limitations that prevent the drop-down menu from displaying on top of intersecting embedded objects.

To avoid conflicts with embeds, set the wmode attribute to transparent in all your <embed /> tags, and set the value attribute to transparent in your <object /> tags.

<script type="text/javascript">
a2a_hide_embeds = 0;
</script>

<object width="320" height="256">
	<param name="wmode" value="transparent" />
	<param name="movie" value="http://www.youtube-nocookie.com/v/N1LtFh3uT44&hl=en&fs=1&rel=0"></param>
	<param name="allowFullScreen" value="true"></param>
	<param name="allowscriptaccess" value="always"></param>
	<embed wmode="transparent" src="http://www.youtube-nocookie.com/v/N1LtFh3uT44&hl=en&fs=1&rel=0" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="320" height="256"></embed>
</object>