> You better post your problem in firebird-support group. There you will get much faster response.

I doubt - they will point you here, since this is JDBC driver issue.

The issue with batching BLOBs looks new to me, and most likely, is
related to auto-commit mode.

Anyway, in case of Firebird you do not win anything with batching the
calls, since the API does not have batch calls. Driver simply simulates
the batch calls by executing them one by one.

Roman