Card images distorted

Created by: membla

Seems like the Flexbox card implementation in alpha6 has produced some unwanted effects for card images – distortion occurs regardless if using .img-fluid for the .card-img-top or not. I know it has been discussed before but if the default behaviour of .card-img-top means distortion of the image I'd say .img-fluid should be applied to card images by default.

(OS X 10.12.1 Chrome 55.0.2883.95)