Thanks for trying to help.
I'm upgrading only one website on one domain.
I think diff are not so important and here an exemple.
On the fr language i made little cosmetics changes.(/xxxx/tikiwiki/lang/fr)
After the update i got several like this bellow;
"Envoyer Ã un groupe",
Result on the website is;
"Parse error: parse error, unexpected T_SL, expecting ')' in /home/httpd/vhosts/israelfr.com/httpdocs/tikiwiki/lang/fr/language.php on line xxx"
This is the easiest to see and deal with, but i fear about changes in others scripts where it is far harder to track them.
PS : Do you thinks that instead of trying to clean the code i should redo an update (removing the -q quiet option from cvs command) ?