Go fsck yourself
For about the past half hour, I've not been able to download images, via 'Download', 'DS', or even 'View' buttons. I click on any of those, and it says "Waiting for derpibooru.org…" at the bottom of my browser, or the little spinning animation plays when the browser is waiting for a reply, ad infinitum. Up- and down-vote buttons work fine, though. No such issue on other 'booru sites AFAICT, so I'm fairly certain it's nothing on my end.