>> It works fine in local and in the development server. We have crash only
>> in
>> the production server, with exactly the same datas.
>>
>> Weird....
>
> So tell us what is different between the servers. "Nothing" is clearly
> the wrong answer.

development server :
MySQL - 5.0.21-log
phpMyAdmin - 2.8.0.4

production server:
Server version: 5.0.24-Max-log
phpMyAdmin - 2.11.2.2

The 2 of them are under a Linux, but I can't said wich one.

More, in local in my windows machine, the same queries works with the same
database and the same datas:
Server version: 5.0.41-community-nt
phpMyAdmin - 2.11.2.1

I konw that's bad to do not work with the same environment, but I asked for
a mysql5 and that's what I had in development and in production. I
discovered the production one a couple of weeks ago.

another example of failing query:
update institution SET Gal_Nom = REPLACE(Gal_Nom ,'é','é')

See++

Stef