Go fsck yourself
For about the better part of the past hour (since ~07:00 UTC), I've been unable to download images from Derpibooru, using the Download or DS buttons. I don't get an error message, it just sits there after clicking (message at the bottom of the browser says "Waiting for derpibooru.org…", browser's spinning icon spins), and does nothing.
EDIT: Oddly, I can still view pages here on Derpibooru without a problem, or upvote, comment on images (or in this forum/thread obviously), etc.; the only thing I can't do is download images.
I'm sure Cloudflare is the problem, but thought it best to let you guys & gals know, anyway.
EDIT 2: I found that I can download images IFF I access the site through my VPN.
EDIT 3: Nevermind, I guess…? Cloudflare un-f*cked itself, and downloads are working as intended/normal again, with or without VPN. Yay! :)