Thank you to Krace
for spotting an 'odd' bug which was unlikely to happen, but in his case, it did. Also, because I was debugging the ranks submission and viewer pages, I came across another bug which would cause the viewer page to crash if there was a problem with the submission image. That has been fixed so it displays no image in case there is a problem.
I took a rank break and revised the Kuro Girls pixel art that is scattered around the site. Notably: I split up the Award Kuros and now there are four different ones instead of one with all four different medals.