Flash External Interface “addCallback” Gotcha in Internet Explorer

Just learned this one the hard way. Apparently in Internet Explorer, a Flash application cannot use the “ExternalInterface” to add a callback named ‘play’. This list of reserved words also includes ’stop’, ‘tags’, ‘item’, ‘length’ and possibly others.

Makes sense, but it took me a while to figure this one out since it does not seem to be documented anywhere. For a while there, I was a very frustrated developer!