Server crash on postgresql 8.2.4 with tsearch2

Hi,
I'm tryng to upgrade a 8.1.3 server to 8.2.4 and I have a problem with
tsearch.

I use french snowball package to compile a stemming lib -> dict_fr.so

Now if I do a query like this
 select to_tsvector('default', '... something with more than 200
chars');

-> result ok

but
 select to_tsvector('fr_FR', '... something with more than 200 chars');

-> server crash

Does anyone faced this bug ?
Is there a fix ?

Thank you for help