thumbnail size crop

[jankoo]

hi,
i have a question about products thumbnail size in the category layout.

i have dynamic thumb creation enabled.
i have set width to 0 and height 250. (i try many settings)

but i always get the different image sizes/ratio on products..
we have a shop with auto import products with images from many feeds. so there is no way how to have the same aspect ratio for all images.
so we need to crop image size for thumbnails, so they look normal in the category layout.

pls how a can get this?
btw.i cant believe that this is still not VM core function..

thx