Uploaded images showing as broken links

This morning, one of the images I uploaded shows up as uploaded in my media library, but shows as a broken link if I make it a featured image on one of my blog posts. I’ve tried other browsers, clearing my caches, etc. – that doesn’t work. I checked in ftp, the pic is there so I tested the pic’s URL, and that does load correctly. No new plugins installed, or settings changed, since I uploaded pics just a few days ago, and those pics (as well as all previous pics) show up just fine.

Any ideas?