udk tells me there is no errors and yet i keep falling through the floor, i found this before and had to delete what would seem to be perfectly fine peices until it resolved itself
it's happened again and i can no longer reverse any actions, i have been working on this level for hours.
is there anything i can do or do i just throw my work in the trash?

i would also like to point out that multiple materials don't register and some prefabs decide to change there peramiters on there own after i place a cube/cylinder/etc
it doesn't resolve itself and i end up having to delete multiple peices until said refab gets deleted, i've just been lucky that the prefab was not undeletable due to a kismet