The problem is that there is this sort of black field in an area around the doors. Whenever I close in on it I end up a few feet up in the air, as if I was above the area. I suspect it's the ones with a stairway but it's only the case with a few doors anyway. Anyone had a similar problem?
Linked a photo in case you didn't understand what I mean.
[img=http://img329.imageshack.us/img329/9961/bugwc4.th.jpg]
![[img=http://img329.imageshack.us/img329/9961/bugwc4.th.jpg]](http://img329.imageshack.us/my.php?image=bugwc4.jpg){kind=link}