I've copied the files from /original/ into the appropriate sub-folders in /images/ and that has restored proportional thumbnails in some cases.

Other categories remain problematic:
http://www.mimagallery.com/index.php...ndex&cPath=148

Note that the thumbs here are coming from /images/categories/. On categories without this problem, the thumbs are coming from /bmz_cache/. Image Handler isn't handling the problematic thumbs. How do I get these properly generated by IH?

Also, I still have problems with some products where the large size image does not pop up at full size (though the source of the image is full size.)
http://www.mimagallery.com/index.php...oducts_id=1832