Hm I've just checked the names of several random thumbnails in the photography gallery and they were all named like you said: GalleryThumbxxxxx.jpg. On my end I don't see any bmp called untitled. Can't imagine they would resort to BMP files either, that would make absolutely no sence from a storage POV or a bandwith POV.

What is a friend? A single soul dwelling in two bodies. - Aristotle
-= Glass Eye Photography =- -= My Rendo Gallery =-