one thing I would be aware of is that if you wish to delete the image from the gallery, remember to delete the thumb as well
Well its not a new idea and I suppose it really boils down to whether you like it or not. It doesnt have a warm cosy feel to it and the formatting needs a little work but as far as the scripting side of things go, no errors so your on your way to having a good gallery
one other issue was that CSS scroll bar colours is non-standard and thus my FireFox doesnt know what do with that and causes an error. W3C is an important step when designing a website.
Kind regards
Dal