I'm not a computer guy but from what I understand being a regular on many other forums, and hope I'm correct, when you download pics to a forum directly, it adds the total file megabites or whatever to the host's server possibly filling up the memory or what ever and slowing the site down. I think that's when the error codes show up. To be honest, I'm a computer idiot and could be way off. But when I got into photography I learned this and now use this method exclusively on ALL sites! Plus, thumbnails suck. [:'(]

More examples.