First of all: I like simpleviewer.
I have a small problem. When i make a gallery under every photo is the same caption. After creation of the gallery i get the option to change the caption for each photo, but when change something and i click on 'edit captions for this gallery' there is a blank screen, no message 'xml file will be recreated' and nothing changes.
On your demo-page it works, but not on my page. Is there something i'm missing?