Crap like this always happens whenever a new version of WordPress comes out, but it’s especially irksome now that uploading tiny images, like the cartoon thumbnails, are causing a problem for some reason. What’s the point of a fancy AJAX interface if I have to upload a simple graphic via ftp?
I realize this griping sounds like gibberish to most people, but I just want it out there in the hopes that some kind, web elf reads it and leaves a solution in the comments.
UPDATE: I just installed the plugin to disable the flash uploader. That’ll work for now. Maybe they’ll fix whatever’s wrong in 2.5.1.