I cannot seem to be able to upload an avatar for myself on this site. I have tried with the latest Chrome (24.0.1312.52) on OS X (10.6.8) and Windows 7. I have tried several image sizes and formats (PNG, JPG, GIF). All I get is the same message:
Upload a valid image. The file you uploaded was either not an image or a corrupted image.
The problem with that is that there’s no information about what is an allowed image format and size. I suspect that the uploader is broken for my browser or something.