> all the users see is the performance (currently not great) and the

reliability (fine)....

I'm very sorry to say this but I don't agree..
I think IB4 was more stable.
The only error I see in interbase.log was " INET/inet_error: send errno =
104 ".
Now I have many.. (in my other e-mail)

I didn't feel any speed improvements/degradements with IB6, or Firebird..

I know the improvements on Firebird, it's hard to say that I did take
advantage of them..