Thanks for the feedback everyone. To answer some questions:
.hsr is a made up extension, HSR standing for Haverford School Robotics. Basically, I have a .htaccess file set up to redirect all .hsr page requests to a PHP file which then shows the appropriate content page based on the URL. It's a prettier solution than having index.php?page=team/about.
The gallery script is called Snipe Gallery, and can be found at
http://www.snipegallery.com/. I would highly recommend it, much simpler to use and more easily customizable (in my experience) than either Coppermine or Gallery. That black text on the search page I hadn't noticed, so I'll fix that now.
The biggest comment I see is the size of the robot logo. I'm going to play with shrinking it in size, though that leaves more whitespace in the white banner area. I may have to put some kind of almost transparent image behind the banner text so that it isn't just white. Thanks again for all your feedback.