I'm using K2 on multiple sites, and the problem is Always the same. The width of the images are good, but the height is not alway the same. The only solution is changing the images with a image editor....
Here you can see a simple example:
www.glansbeton.be/industrievloer/toeslagstoffen
(look at the 6the picture)
Is there a other solution then changing it with a image editor ?)