In the Media and Flash tools, white space is getting created in the embed params; but this only happens with the OBJECT tag, not the EMBED tag. I can reproduce it on your demo page -- this happens whenever you go into edit the HTML. Each time that you click on the HTML tab to edit, it creates another new space in the below listed params. I do not see this behavior in Firefox, only IE.

<param name="autoStart" value="0"                                         />
<param name="showControls" value="1"                                         />
<param name="showstatusbar" value="1"                                         />
<param name="windowlessvideo" value="true"                                  />