Hi there, I had the same problem last year and somehow solved it. Now I’m again stuck in 2015 trying to reconstruct my solution… I’ll post here if I find out how I fixed it.
thanks Jordy for the fast reply! Sure we can contact the developer, I used “Crop thumbnails” by Volkmar Kantor. http://ww.wp.xz.cn/extend/plugins/crop-thumbnails/
He’s from Germany like me, so I’ll drop him a line about the issue. But I think it would be ok, if the solution I mentioned above (uploading a cropped high-res Version, renamed “[email protected]”) is going to work for these few cases. I don’t think that I have to do that very often. So I’ll try the workaround for now.
This retina thing is still quite new and I actually didn’t think about it at all until I bought a Macbook Retina a week ago. Since then this resolution thing is drivin’ me crazy and your plugin is totally making things easier 🙂