After each update of the plugin, I have to add
height:auto
after
.sy-slide>img{width:100%;padding:0;margin:0
resulting in
.sy-slide>img{width:100%;padding:0;margin:0;height:auto}
to unsquish images in the slide show.
File in wp-content>plugins>responsive-lightbox>assets>slippry>slippry.min.css
It would be lovely to see this fixed.