If your system clock has *ever* been changed (either by a person or by your operating system), particularly in a backwards direction, since starting a tribe, the game may be permanently affected even though the system clock is stable now and your other VV games are working properly. There are very complex, independent timers in Virtual Villagers, and any of them can be affected by clock changes. The only thing that can possibly help is to give the tribe enough time to sort out those issues.

One thing you might try is starting another tribe in a different player slot to see if the problem exists there, too.

We have discovered that there is a _bug_ that occurs during burials that temporarily causes problems with the roster and the gravestones. Once the burials are complete, everything should be working again, although it's possible that there will be an extra or missing villager. We are working on that.

No, it doesn't mean that. Almost everyone's computer system clock is kept synchronized to a time reference by the computer's operating system. Normally, that time adjustment is, at most, a few seconds and doesn't cause any problems. The problems are introduced when the computer's system clock is unreliable, either because people are using it as a "calendar" to check dates (that happens more frequently than you might imagine) or because of a computer problem, such as a depleted CMOS battery.