loadMovie()... unless I don't want to

I’m running into some ultra-fun weirdness. I have a regular .jpg that I want to dynamically load and display in flash. I designed my preloader to watch for when all such images are loaded, and then some other code takes over to position it, etc. It’s even able to catch images that fail to load and replace them with an ‘image missing’ graphic.

The problem, however, is that certain .jpgs won’t work - they simply don’t display at all. Furthermore, which ones seems to be completely arbitrary. I’ve even taken one image, copied it, and had the original work while the copy doesn’t.

I’ve verified that this has nothing to do with file permissions or group or user ID or something like that. Anyone had a similar experience like this and is able to help?