I tried to upload a 2820x2280 px file for my repository image (okay, I didn't realize it was that big), and I got the following error (also see attached):
There was an error uploading your image The selected image size is %(image_width)dpx * %(image_height)dpx. The maximum allowed image size is %(max_dimension)dpx * %(max_dimension)dpx.
Pretty trivial, but bothersome because you can't see the maximum allowed image size.
Browser: Chrome Version 32.0.1700.77