<param name="wmode" value="transparent"> wouldn't work on mac screens but maybe now it does in osx. Useful for when you have flash movies displayed over a jpeg background on the page, and it doesn't create the 'fringe' you get with a gif.
The wmode=transparent modifier appears inside both the object and the embed tags.

A couple of corrections to the example...
- <param> needs no closing </param> tag
- place the <param name="wmode" value="transparent"> within the object tag, rather than outside it.
To make it clearer, heres an example of placement script for a swf.. note the forum software might renedr some strange icons in the code:


<object classid="clsid27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="325" height="525" hspace="0" vspace="0" align="left">
<param name="movie" value="images/heron_fishfly.swf">
<param name="quality" value="high">
<param name="wmode" value="transparent">
<embed src="images/heron_fishfly.swf" width="325" height="525" hspace="0" vspace="0" align="left" quality="high" wmode="transparent" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash"></embed></object>


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