Query 4-5 times slower after ANALYZE

Hi,

I'm using Postgresql 8.3.6 under Freebsd 7.1.

After a fresh restore of a customer dump (running version 8.2.7 at the
moment), a rather big query executes in about 30 seconds. As soon as I
run ANALYZE, it is instantly 4-5 times slower. I could check that
multiples times.

Here is the EXPLAIN ANALYZE before the ANALYZE:
http://www.attiksystem.ch/postgresql/query_slower_after_analyze/before.t
xt

And here the the EXPLAIN ANALYZE after the ANALYZE:
http://www.attiksystem.ch/postgresql/query_slower_after_analyze/after.tx
t

Any idea what could be turned on/off in order not to have this slowdown
after the ANALYZE?

Best regards,

---------------
Philippe Lang
Attik Syste,