Getting those errors on ffd images. Haven't looked around enough to see if anything else is borked.

Scratch that. I'm getting them on ALL images.

Seems I can open single images but not with tabs...

Might be fixed by something I fixed a bit ago that will be live soon.

I think it's likely that you just need to try logging out, clear your browser cache and e621 cookies, and log back in again.

Things seem to be working fine for me.

YET you didn't include ANY links to 404 pages for us to diagnose. This patch will go live sunday after the bugs have come in