Its been doing this since day 1, actually. And it is happening on 2 devices. It could be related to the save game, though. I copied the savegame file from the Clie once I got my LifeDrive. Now the game is running on both machines. In fact, I'm carrying the Clie around just to 'finish' the game.

Just looking at the stats:
13104 max population
12347 villagers born.
825510361 food harvested

Either that's a totally unbeatable record, or a little messed up file.

OTOH, 8 puzzles solved so I will stick with this file for a bit more.