Hello Douglas,

p> Recently I upgraded a customer site from firebird 1.0.3 to 1.5.2 for
p> performance reasons.
p> Since then, fb crashes every 2 or 3 days.
[...]
p> Do you guys have _any_ idea of what may be causing fb1.5.2's
p> termination?
p> If the crash was related to UDFs I'd see it in the log files, right?
p> Anyway, I can post the source and declaration if necessary.
p> Anything else I should check? Known gotchas? More info?
AFAIK, it is recommended to backup database with FB 1.0 gbak and then
restore it with FB 1.5 gbak. Probably, it would be a problem for your
product database, since there is no "official" way to downgrade the
database. As far as I remember, you may try to backup restored 1.5
database with 1.0 gbak: if it's OK, then you have a chance to
downgrade upgraded database.


HTH
--
Best regards,
Pavel Menshchikov
http://www.ls-software.com