Yes, it quite often happens to me -- but not for the recently posted stuff. It always seems to be for things posted (rough guess here) over a month or two ago. New stuff seems fine. I assumed it was just me as no one else had mentioned it...
And it's always the same images. I mean, if an image doesn't load then it just won't load for me any time I try it, even if other stuff will, and even if I clear out caches and so forth in between times.
Tahing a specific example -- I can't see the picture in
this LO at all. Or
this one. And I've tried from two different PCs in two different locations, using two different browsers.