On the validation page there is an explanation there...but basically you enter one image and when that has loaded press the back button and reload the second image. Repeat until all of images have been uploaded and then you will see all the image thumbnails lined up down the left hand side of the page.
Thanks Judi I'll send a ticket, trust me to find a way to mess up a perfectly simple system.
Hmmm... Last time someone didn't upload their originals correctly, it resulted in a domino effect that wiped 12 challenges worth of images permanently from the site, erroneously duplicated several "Why didn't this score better" threads, and caused severe damage to a whole bank of network routers and an entire regional internet outage. Fortunately Slippy fixed the router issues, but the lost challenge images were never recovered (the challenges were expunged - like they never even happened) and the duplicating thread issue still manifests randomly to this day.
Hmmm... Last time someone didn't upload their originals correctly, it resulted in a domino effect that wiped 12 challenges worth of images permanently from the site, erroneously duplicated several "Why didn't this score better" threads, and caused severe damage to a whole bank of network routers and an entire regional internet outage. Fortunately Slippy fixed the router issues, but the lost challenge images were never recovered (the challenges were expunged - like they never even happened) and the duplicating thread issue still manifests randomly to this day.