I have a .fbk file that cannot be restored using fb 2.5.1, I have no problems with fb 2.5.0, the error I get is:
gbak: committing metadata
Database restore canceled 14:17:15 due to IBPP exception:
*** IBPP::SQLException ***
Message: isc_service_query failed
SQL Message : -413
Overflow occurred during data type conversion.
Engine Code : 335544334
Engine Message :
conversion error from string "1O1 "
This is the FlameRobin error, but I get the same error if I use gbak in the console.
I can send you the .fbk if you ask me, since I don't see a way to attach it here.