I forget what the fix was for this last time but, I just posted here and at SMC. Same browser, same PC, same session. On SMC I see the thumbnails of the pics I post; here I get this:
This happened once before and then auto-magically went away. If I close everything down and return here and to SMC, I still see the placeholders here and still get the thumbnails at SMC. If I click on the placeholders the pics show fine, you just can't see them as thumbnails.
Last time this was happening to some folks and not to others. IE, FF and Chrome all react the same.