chrond reports "cron.err" in logfiles even if all 'run-parts' scripts exit cleanly

Each time crond is executed we get a “cron.err” in the logifles even if the scripts executes cleanly (look at example below):

#!/bin/sh
echo "Hello world"
exit 0

Logfiles look lie this:

Mar 24 12:00:01 arbgw01 cron.err crond[24493]: USER root pid 8685 cmd run-parts /etc/periodic/15min
Mar 24 12:00:01 arbgw01 cron.err crond[24493]: USER root pid 8688 cmd run-parts /etc/periodic/hourly

(from redmine: issue id 18, created on 2009-03-24, closed on 2009-03-24)