They are not for me! If I set to more than 15... I get only 12!
Some mod has been made that has affected this long-time working feature. :o)
And it doesn't matter whether I use Firefox or that other browser... IE. :o)

I had to move the image server to a new machine last night. It is currently working correctly, but serving up new images is going to be slow while the image server generates all the thumbnails and resized images. It should slowly get faster and faster as the image sizes are cached.

Also, I disabled showing more than 15 images in a gallery because it is difficult for the server to generate that many thumbnails at once. When the system speeds back up I'll increase the number of images viewable per gallery.

re. # of thumbnails not working? Thank-you, very much, for both your answer and the speed of your reply. :o)