[YouTube-API] Firefox problem using Javascript API within a Facebook iFrame app

I created this Facebook iFrame app:
http://www.facebook.com/thehalogroupNY?sk=app_149591121776137

It uses the Javascript API to display different videos when you click a thumbnail. It works in Safari, Chrome, and even IE8, but not in Firefox. The initial embed works, so you can see the first video, but subsequent calls to cueVideoByID() throw the following error in Firefox:

myytplayer.cueVideoById is not a function

myytplayer.cueVideoById(id);

Where id is the YouTube video id.

Here is a simplified version of the function in question

function swapVideo(id) {
        myytplayer = document.getElementById("ytPlayerIDHere");
        myytplayer.cueVideoById(id);
}

Not sure why Firefox alone is causing an issue. Anyone have an idea? Could it be something about how FF handles Javascript? Is there any way I can cast the YT player instance so that Firefox does not think I am trying to call a Javascript method that I have not declared?

Any help would be greatly appreciated!

Thanks in advance,

Augie

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