I hadn't noticed this before the .23 build, but I've got to admit I hadn't looked closely before. The turn counter above the minimap (and I know the minimap isn't implemented yet, but I thought the turn counter was working before) is incrementing only in big jumps, not on every turn. For example, I went from turn 69 to turn 97 with the counter not incrementing in between. Now it's been stuck on turn 97 for at least 10 turns.
