Right click on your icon and click "Save As" or "Save Image As", save the image.
Check the file extension, it should end in ".gif" or ".jpg" or something similar.
Upload a new icon with a different extension (eg: if the old one was .gif, upload a .jpg).
Does it work when you do that?
Elders my ass, you're shit's still in school,
Hunt and pecking at the keyboard like a spaghetti-damned fool,
Rim-riffing your hard drive like a tool,
Face it. I rule.