Avatar off Internet won't work (yes, I'm a nOOb)

For some reason I can’t seem to use my avatars on Imageshack / Photobucket. When I enter the direct link I’ll get a message saying “The uploaded file is not a valid GIF, JPG, or PNG file. Please ensure that it is and try again”. This is beyond me becasue the file is in fact a GIF!

My current avatar was uploaded so that works. Am I missing something here?

download it to your computer then upload it. that’s what i did. :doh:

So I take it it’s a forum bug? sigh I’ll just have to upload it.

Thanks.