Alright. I was editing a town in my scenario. Town number 1. I went in to play it, and it put me in the default town, Town number 0. However, when I enter the town, it is completely black. There is some cave floor, and some adobe porticuli. I take one step, and it throws be out of the town. Not only that, but the town name was changed to something like %#&!. I went into the editor, and as soon as I started to edit the town terrain, it gave me an error message. It said I could close the program, or ignore the problem. If I ignore it, then it closes the editor anyway.
I am on XP.