It seems that my graveyard has stalled at 50 burials. Now whenever someone dies the villagers take the remains over to the graveyard but no new tombstone pops up and my stats never increase from 50 dead people buried. How can this happen? I would think that if 50 was the max everyone who hit 50 would be tied for 1st place, like when you solve all the puzzles.

The graveyard can hold only 50 villagers. That's just a limitation of the game design. The stats put 0 deaths in first place, not 50 deaths. The goal is to lose the least number of villagers.

OK - that makes sense. I haven't been able to get a villager to live beyond 97 yet.