What was the error? Is this on a locally installed copy or cloudstore? I only see blank white above; would it not upload on wagn.org either?
Actually, it did, it's just that the image was white. I figured I'd change the background color of the site to black, but I can't figure out where the CSS that's controlling that is. For another time, I guess.
At any rate, it's a cloudstore install. The error just says a server error. Yuck, sorry about that. And tells me to enter a support ticket.
I also can't upload a favicon. Same error.
Oh, ok, I think I figured this out. I recently changed something that made it so that new wagns come with a few pre-installed images (specifically *logo, *favicon, and *credit+image). They have special handling that stores them in a special directory so that there doesn't have to be a separate copy of each image for every site. But apparently that special handling is breaking things when you try to upload a new revision, presumably because of file permissions. Since I locally have those permissions on my development box, I wasn't able to reproduce the error.
Will post a fix soon.
Ok. Let me know when you want me to test it.