:: I suppose "2-3 of these a day" doesn't mean that users
:: access fb db only 2 or 3 times a day.

No, its not heavily used yet, but the DB is being used and processing at
least a couple thousand things a day (selects, inserts, updates).

:: Did you follow in which situations does it occurs? Could it
:: be a concurrency problem? Some action that affect
:: statistics? Does it occur in any situation?. How to obtain
:: Firebird Team's opinion about this?.

I have no idea... I don't even know when it crashes sometimes, I was just
manually recovering it from another crash when I saw these in the log.