Michael, I had just copied and pasted from the embedding example and didn't notice that. Unfortunately, even with the changes it still doesn't work. I also tried changing it to strict html doctype, thinking perhaps IE wouldn't go fullscreen in quirks mode, but that didn't help either. I can't understand what is different between my site and the krpano site that would cause IE to ignore fullscreen requests. I can't find anything in the flash security sandbox model that would prevent the pano from going fullscreen either.