sbillard, I can actually rename each file with the right name before posting them on Zenphoto, but it is not the best solution. I see to problem :
1/ you have to set the title twice : first in the filename, second in the title field when you post the photo
2/ even if I rename a "IMG1234.JPG" into "my-first-day-in-Berlin.jpg" for instance, there is still this ".jpg" that has no reason to be in the URL (cf http://www.w3.org/Provider/Style/URI). I want to remove this extension because with an album photo, you don't just give access to a photo file, you give access to a whole photo+title+comments+category+tags resource, which is more than a simple file, and so can't have any extension.
That's why I suggested :
1/ to have a checkbox in the form to add a photo that, if checked, generate a qualified name from the title (the way Wordpress does, cf DirkSohler comment), and rename the file this way. For instance, if I put "My first day in Berlin" as title, the file IMG1234.JPG I sent is renamed on the server as my-first-day-in-berlin.jpg
2/ find a way (maybe with Apache content negociation or mod_rewrite) to use the URL /my-first-day-in-berlin, without the ".jpg"
This way, Zenphoto would have very nice URLs, without changing the whole design (i.e. zp would still be FS based, and not DB based as Wp or other script can be).
It would be great, I can't find a great photo album manager with nice URL...
Thanks again for your work !