My applet works fine when I test it on my pc (through Eclipse).
When I put it on a webpage though, it does not work. The webpage shows a blank screen at first, but through reloading the page and/or clicking, part of it shows. Once I get the slider to show and drag it around, some of the parts of the applet that change do show, but some display weird and some not at all.
You can look at the problem here (Edit: link removed because error is fixed).
ETA: I fixed the problem. It wasn't finding one of my images properly. I'm still surprised that something like that would cause such havoc with the rest of the applet though. Why wouldn't it display everything except the broken picture?