i change the dimension of the thumnails in the post related from css customize to 230x192...i changed also the img thumbnails size fron confguration-media and install and use regenreate thumbanils...but...
i still see the thumbnails of the related post so blur...and the img is not blur when i upload becuase i cut it on photoshop and it is one good one for each post..
down the 2 woman in black background is the worst one
but from this link you can see the img is good !
i read a lot of discussion but not osultion