[galaxy-dev] UTF8 problem with database "An error occured when getting updates from the server"

Dear all, I have just changed my galaxy database encoding in utf8 to avoid error of loading histories. It works fine. But when I run a new job after this change, the bad characters re-appear in my output and the error "An error occured when getting updates from the server" re-appear too. When I've changed my galaxy database envoding, I've modified the /etc/mysql/my.cnf file and replace all of the bad charcater in the previous database before re-install it. Any idea of a change I omit ? Thanks. Julie