Thanks Fabrice, that will help a lot.
In my applications the conflict was not a direct table conflict e.g.
USER1 locks Table1 record that references Table2 via foreign key with a
cascade update/delete enforced then
USER2 tried to lock Table2 for update on the referenced record - result both
users locked !
Is this the same scenario in your case ?
perhaps a simple test db could used to resolve if this is the issue !
Regards,
Frank.