ToME WikiWithin the Old Mage's Quest in Minas Anor, my Mindcrafter created a pair of void jumpgates with one in the upper left starting position. Upon completing the quest by killing all of the monsters, complete with the "The library is safe now." message, stairs were not created as they should.
Correction: I may have accidentally overwritten the stairs with the creation of the void jumpgates. One could argue that this shouldn't be allowed to happen.