It happens that snipped-for-privacy@ccanoemail.ca formulated :
I get the same from Imgur, some trimmings around the edges but the 'canvas' remains dark grey. My Chrome browser does the same thing.
Too bad when posters post images and discuss them here without describing them and I can't see them.
Someone once posted one with angle brackets around it, and it worked. Then I tried the original - and it worked too. Then later back to dark grey every time since.
Old version won't upgrade on my XP machine. 52.9.0.6746