I have searched this forum and found the same problem, but the links to the discussions don't seem to work so I needed to start a new one.
I'm new to podcasting, but trying to upload my clients monthly radio talkshow as a podcast. Keep getting " Podcast artwork must be between 1400 x 1400 and 3000 x 3000 pixels, JPG or PNG, in RGB color space, and hosted on a server that allows HTTP head requests" error message. I have checked my profile image and specific podcast episode artwork and they seem to meet the size, color and format requirements. I have also double checked my permissions and as far as I can tell they are correct. Is there something else I might be missing? Why is this so difficult? ARGH! Thanks!