Over email, I’ve answered inquiries about this with nothing better than using a pixel GIF workaround and moving the PNG image visibility to the parent as a background image. Lame.
I’ve decided that 0.0.9a will simply copy all events bound to any fixed IMG nodes to the resulting visible VML, and will modify them slightly so that they fire in the scope of the IMG node as intended. I estimate that will get around that catch-22. One can hope, anyway.