Posted by Mangore Kiramin on April 23, 1998 at 16:15:10:
For the ceiling that you can jump through (be it sky, solid or whatever), you should make sure that the Impassible flag is checked in the surface flags. And for that secert place that you fall through the bottomless pit... well, you need to make sure (using the Consitancy checker) that the adjoins are properly aligned, and that the faces are planar and convex and that the sectors are convex. If this doesnt help, then you might just have to delete those two sectors and re do them.