Why are my images getting cropped?

Take this one for instance:

http://boards.na.leagueoflegends.com/en/c/memes/ctx0Ta4N-give-urgot-what-he-wants?comment=00000002

As oppose to this one from several months ago before this started happening:

http://boards.na.leagueoflegends.com/en/c/memes/t4shP2mn-hey-sion-why-didnt-you-help-us?comment=0000000000000000