It seemed like 0 was unloading the level (sorry for the lack of clarification on that but it's now not necessary..) but it actually seems to be doing something strange with the camera, maybe placing it below the level. I tried commenting out #include default.c, but I think it's included whether or not you state that in the newest version, so I can't tell if it's because of some built in functionality for 0 or because of some strange thing in my own code.

I'm open to suggestions, but I'm also just going to keep looking through my own code to see if that may be the problem - though I can't find anything so far...

Edit: Placing on_0 = NULL; in my main function actually fixed this, so regardless of the problem it's not happening anymore.. I just wish I knew what it was.