I agree that it is probably IE. I tried it in Firefox, Mozilla and Opera; worked fine.
Don’t know if it’s just me, but when I increase the text size in my browser so I can read it, the layout falls apart. I’m using Firefox on a win2k system at 1024×768.
Just a suggestion by you might make the small photos on your site links to a larger photo. Many photo sites use thumbnails that lead to bigger pictures. I found myself repeatedly trying to click to get a larger view. Incidentally, I use the 300D; it’s great.