120 (width) x 78 (height) looks fine, the other way around looks very blurry. (see
here. But I'm not interested in 120 x 78.
Plogger has the a feature to use squared cropped images and these thumbnails come out nice, no matter what the size or orientation of the original image is so I don't think it's an ImageMagik issue. I also think it would be very odd if that feature would only work for a 120 x 78 setting. It seems like photopost crops the image to something smaller than the values set and just blows it up in order to get to that size when the orientation of the source image is a landscape one. Odd that it work's okay for a portrait image by the way, what can you make of that?