Да, я так пробовал.

Код AS3:
<imageUploader:ImageUploader
id="imageUploader"
onImageLoaded="{this.imageLoaded}"
imageLoaded={ trace('1') }
/>
Выдаёт ошибку:

Код:
Open quote is expected for attribute "imageLoaded" associated with an element type "imageUploader:ImageUploader".