(In reply to comment #28)
> > But the data is different now. Perhaps it runs out of memory while processing > the increased amount of data, or fails to handle one particular item.
> 
> Yes, those are distinctive possibilities. Do you have any suggestion for
> finding either of those out?

The factory reset was the brute-force suggestion for finding out whether the
data is the problem. If you don't want to do that, perhaps you can wipe out
data for individual apps manually?