AkamaiHD/Facebook problem?

I'm seeing, when trying to view images I posted to a facebook album,
grey boxes instead of thumbnails. If I click all the way through and
View Image, I get either 502 Bad Gateway from nginx, or the odd message
"All blocks down", which I can't successfully google.

This seems intermittent, or slowly-clearing, but I thought someone from A
might want to know. I can supply full URLs off list if desired.

-- jra