I've seen a few threads about this error so far, but none have helped me fix my problem, which, as the topic says, is that any character's body is invisible. I've been able to go through a little of the game using the drop shadows under monsters, but when I got to town I also had random little graphical errors, like a giant fluctuating pie slice of grey exploding from the top of my knight's head....
I'm currently running Ubuntu, and have tried installing the java the download in the troubleshooting main topic says to, but it downloaded a random .bin file that didn't do anything.