Comment 125 for bug 401823

For information, this "Gdk-WARNING **: XID collision, trouble ahead" message shows up repeatedly in my console when (and only when) i am displaying a flash having parameter wmode='transparent'. Removing this parameter also removes the trace. I tried adding/removing the parameter a dozen times and the behavior is pretty consistent:

 <embed id="flash_object" src="xxx.swf" quality="high" bgcolor="#869ca7"
   width="100%" height="100%" name="XXX" align="middle"
          flashVars=""
   play="true"
   loop="false"
   quality="high"
   allowScriptAccess="always"
   type="application/x-shockwave-flash"
   wmode="transparent"
   pluginspage="http://www.adobe.com/go/getflashplayer">
 </embed>

shows "(firefox-bin:10775): Gdk-WARNING **: XID collision, trouble ahead
" traces in the console

 <embed id="flash_object" src="xxx.swf" quality="high" bgcolor="#869ca7"
   width="100%" height="100%" name="XXX" align="middle"
          flashVars=""
   play="true"
   loop="false"
   quality="high"
   allowScriptAccess="always"
   type="application/x-shockwave-flash"
   pluginspage="http://www.adobe.com/go/getflashplayer">
 </embed>

does not.

In my case, i doesn't change much since i need to have this 'wmode' value to 'transparent'.