First is a security request. I like how the albums folder is relocated somewhere else. It's not accessible via the web because it's outside of the web folder. The cache folder isn't. If the person can figure out the exact string it's quite easy to access it. So make it like the albums and allow a relocation. Besides the cache folder gets huge after a while and I end up making a sym link anyways to offload it from the main web folder.
Second is a feature request and I saw someone below with the same request but I thought I'd add it in as well. I'd like to choose the size of the thumbnail, preview and the large size (not full-size).
Third is a feature request for auto rotation of images. The images should auto rotate based on the exif info.
Fourth is a feature request for an opt-in albums. What I mean is when the photos are automatically uploaded it's not made an album on the web until you turn it on.
Now before you go on let me explain beforehand why. I love your program. It's lightweight and fits what I need it for. Here's how I use it. My albums folders are just a link to my photos directory. It houses all my photos I ever have. When I download the photos from my camera it appears on my website. Easy and with no fuss.
What I do is I have a custom script that I run, and it automatically resizes the photos, auto rotates them and puts them into a separate website folder as a copy. Zenphoto looks at this folder for any updates. My script does the following, it resizes so that the large size is set, auto rotates and then publishes when I say it is ok. I want to eliminate this step and let zenphoto do that instead. With the feature request it will make it a heck more functional.
What do you think?