Okay, I've tried everything that I know to do (which sadly isn't much)
Anyway, I'm trying to align the image.php to the center in a theme which is a copy of 'default' but no matter what I do, the entire page in hugging the left side. I've looked for margins I may have missed in the CSS, and then I ended up removing all the divs I could find and still it's on the left. You can see what I mean at http://grimforge.com/gallery/index.php?album=masterful-wallpapers&image=twice_broken_heart.jpg
If you need to see the code, just ask.