I'm still guessing this is the GD... cURL could also be an issue, but I guess you would get the "server down" text on the signature... but you said you don't get any text, than I'm guessing it's the GD...
Coud you PM me your server config (don't post it here for security reasons for your own good)...
I would prefer a link to that file...
{CODE}
<?php
echo phpinfo();
?>
[/CODE]
And I guess I can give it a try to add your requested feature to the script... not a bad idea...
I'll try to make it like, if you would go to user1.png, than the script will automatically load that user1 data... I will look into it tomorrow (today
)...