I'm playing Dungeons of Dredmor on Steam, with Mac OSX Snow Leopard. Every single game I play, I never see any diggles burrow or pop up next to me. I think this might be a bug, but I'm not entirely sure. It might be working as intended, maybe I have an outdated version, or maybe it is a bug. I can't really show you the saves since it's a Core-based thing and not save-based. Maybe one of Essence's Essential Rebalances(the one implemented in Vanilla) might have something to do with it?