I’m also having an issue with the size of the last image in a three column masonry gallery. If there are 4 photos in a gallery, and the gallery is set to three rows, it means the last photo fall on its own row. However, this last image is getting enlarged to fill the whole row, despite being a low resolution thumbnail image. The result is really ugly.
Is there a way to specify just a grid layout instead of scaled masonry style for a single gallery post?