Yes, thank you SBB... that's *exactly* what was happening to me too! (i'm the original poster of this string-- i suppose i should register at some point).

Anyway, I've had it happen several times, and I don't know what is causing it. I also have lost probably around 10 villagers total, but only have 5 gravestones and in the "stats" the numbers don't add up to indicate that i''ve lost 10 villagers.