Hope T'Ville doesn't mind me treating this as sort of a tech support topic for the gallery.
I love T'Ville and see my site as a companion to it.
Anyway, just a reminder that you can upload photos of just about any size you want. I like to upload 800 x 600 of most photos and 1024 x 768 (or even bigger) for a nice photo that someone might want to use as wallpaper on their desktop. The software automatically generates a decent 640 x 480 image as well as a thumbnail.
Gallery owners can even customize the sizes that are automatically generated, the size of the thumbnails, the number of thumbnails per page, and the JPEG quality used to generate the smaller sizes. Each gallery owner has quite a bit of flexibility.