I'm running Firebird 1.5.x on Windows XP and it mostly runs great.
Notably, 1.5 runs significantly better on our XP machine than 1.0 did.
However, I'm still having an annoying problem.

After the server has been up for a couple days, we start getting calls
from users saying they can't connect to the server. When in this
state, neither our Internet users nor our internal users can connect.
IBConsole reports, "Cannot attach to services manager."

InterClient throws the following exception:
interbase.interclient.UnavailableInterBaseServerException:
[interclient][interbase] unavailable database
See API reference for exception
interbase.interclient.UnavailableInterBaseServer

I found a borland site that indicates this error means the server has
stopped running, but when I look at the services list it reports
Firebird as running.

Any ideas?