I didn't specify a browser or version because it's doing it on both.
Cutting right to the bone, no matter what's going on within the web site, if you type the URL directly to the image, you get a red x on some computers. The images were previously displaying fine, and continue to do so in other browsers, they just die in IE.
The site is hosted on a Liquid Web dedicated server, everything appears to be functioning fine, all the other sites are fine, most of THIS site is fine, just some images refuse to load.
The only two logical connection I can make: These images load fine in other browsers, but I DO note a slight delay while they load. But they still show. It's just a specific set of images. I opened and re-saved them, re-uploaded them, same effect.
Only in IE.
For a time I was not outputting width and height attributes due to the dynamic nature of the site (modX CMS, never knew what size they would be) but adding W/H has no effect.
completely re-uploaded the images . . . no effect.
Allocated more memory to PHP (modX based,) . . . no effect.
Tried all the local shenanigans, clearing cache, etc., but this is NOT a local condition - it has been viewed from various locations and over various networks, in IE 8 and 9 mostly, but not a localized problem. The images fail on one computer and the computer next to it, on the same network and browser, works fine.
Has anyone seen this before? Not someone ranting over the craptasicness of Internet Destroyer . . . that images just decide to go missing in it and stay that way.