I'm on dial-up (56K) and am finding trying to scroll the page to edit my images EXTREMELY slow. Graned there are a lot of images but don't normally experience this. I can only jump one image at a time. And, I need to get to the bottom of 230 to get to the SAVE button Is there something that would be slowing down the movement? Guess it feels "worse" because except for description, the fields are empty (per my mass-edit query).
We try to make Zenphoto as fast as possible, but 56k (which I used a long time, too, really no fun at all looking back). You really should consider "upgrading" your connection. Otherwise I would recommend to wait a little until the complete page is loaded...