How to catch errors from images loaded in TextFields via <img> tags? (not Loaders)

Hi,
Hope someone can help me work out where to put a listener to catch errors when attempting to load an image in htmlText (as opposed to a Loader)

An example would be:

var t:TextField=new TextField();
t.htmlText="image <img src = 'filename.jpg' >";
addChild(t);//Error #2044: Unhandled IOErrorEvent:. text=Error #2035: URL Not Found.

Please note that

t.addEventListener(IOErrorEvent.IO_ERROR,errorHandler); // This does nothing
//t.uncaughtErrorEvents.addEventListener(UncaughtErrorEvent.UNCAUGHT_ERROR,errorHandler) // this is not allowed

Thanks for taking the time,
S.