as reported by someone else at http://newsgroup.xnview.com/viewtopic.php?f=36&t=19519
, sort by ratio (and folder) does not work. You answered that you can't reproduce it, so it's specific to some configurations/installations.
Let me know if I can help to reproduce.
I'm using XnView Portable from portableapps.com, version 1.98.5, but I tried with 1.98.2 and still no luck. OS is Windows 7 32bit Italian.
I want to sort to separate some images between vertical and horizontal.