i checked, it died on a SIGUSR1, a gracefull restart, triggert by logrotate...
i could not reproduce it, so wait until tomorrow morning ...
i activated allmessages to be logged...
cheers

(*rolf* me is concentrated on what me can do make me do a good job)
[b.t.w. "I" spoken equals german "egg", so i seem to have a lot of ...]
