Comment 8 for bug 1182010

I guess I found the problem.

Fishermen (in general, not only those in those savegame, also for new games; for all tribes!) mostly "create" fish items, but they don't "mine". If you use the debug windows, you can see that most of the time, the fisher returns with a fish but the resources at the spot where he worked doesn't change.

This problem does not arise with mines.