Dr K. I've just tried to upload a 'screen shot' to help in a question but couldn't make it work. You originally discussed it
here but I think this functionality may have been degraded on the move to your personal website recently. I appreciate you haven't got the services of Axel and it'd probably take zillions of hours to sort; it's just that I thought other users might want to know. (Assuming of course it isn't something daft that I'm doing wrong at this end!)
BTW after browsing to the image on my computer (only 29k) using the 'Additinal Options' link I get the following error message "Cannot access attachments upload path!"