quick update: its just a quick change to the very last part of the code -- use the following text in in ubbthreads.inc.php, instead of what is indicated in the first post (hope thats not confusing -- i can't edit the first post, cuz my time limit has expired

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change this:
// fyrebug addition
array( "#\[fyrebug\](.+?)\[/fyrebug\]#i", '<object width=425 height=400><param name=movie value=http://www.fyrebug.com/fyrebugshell24.swf?&gameid=\1></param><param name=allowFullScreen value=true></param><param name=wmode value=window></param><embed src=http://www.fyrebug.com/fyrebugshell24.swf?&gameid=\1 type=application/x-shockwave-flash wmode=window allowFullScreen=true width=425 height=400></embed></object>' ),
to this:
// fyrebug addition
array( "#\[fyrebug\](.+?)\[/fyrebug\]#i", '<object width=425 height=400><param name=movie value=http://www.fyrebug.com/embed.php?&gameid=\1></param><param name=wmode value=window></param><param name=allowFullScreen value=true></param><embed src=http://www.fyrebug.com/embed.php?&gameid=\1 type=application/x-shockwave-flash wmode=window allowFullScreen=true width=425 height=400></embed></object><br><a href=http://www.fyrebug.com/welcome.php?gameid=\1>Click here to make your own Fyrebug game</a><br>
(the old one uses the wrong value tags)