Is that can help somebody :
When I install PHPDIG 1.8.1 RC it didn't want to create th database, so I used PHPMYADMIN to create the database, but the database has been created with Interclassement : latin1_swedish_ci and also the tables.
So I put everywhere in the table, where there was latin1_swedish_ci I put utf8_general_ci
Now I haven't any errors
Sorry for the english
