Hi,
Thx UFHH01 for your answer. :) It seems that is no mail from cron for 1 hour.
So i tried your solution. This is what happenned !
Steps 1 to 3 everything ok. Except that --purge didn't delete /etc/asl/ and /var/asl/ so i made it manually:
# rm -RIf /etc/asl /var/asl #I backed them up...