Centovacast v2.2.6 running on CentOS

I'm having a problem with cron jobs. They seem to run fine for a while but after a few days/weeks Centovacast will warn me that cron jobs have stopped running. /var/lib/cron is showing the following:

Jun  9 01:34:03 stream2 run-parts(/etc/cron.daily)[27659]: finished makewhatis.cron
Jun  9 01:34:03 stream2 run-parts(/etc/cron.daily)[27512]: starting mlocate.cron
Jun  9 01:34:10 stream2 run-parts(/etc/cron.daily)[27676]: finished mlocate.cron
Jun  9 01:35:01 stream2 crond[27730]: (CRON) ERROR (setreuid failed): Resource temporarily unavailable
Jun  9 01:35:01 stream2 crond[27730]: (centovacast) ERROR (failed to change user)
Jun  9 01:35:01 stream2 crond[27729]: (CRON) ERROR (setreuid failed): Resource temporarily unavailable
Jun  9 01:35:01 stream2 crond[27729]: (centovacast) ERROR (failed to change user)
Jun  9 01:40:01 stream2 crond[27951]: (CRON) ERROR (setreuid failed): Resource temporarily unavailable
Jun  9 01:40:01 stream2 crond[27951]: (centovacast) ERROR (failed to change user)
Jun  9 01:40:01 stream2 CROND[27953]: (root) CMD ([ ! -f /etc/cron.hourly/0anacron ] && run-parts /etc/cron.weekly)
Jun  9 01:40:01 stream2 crond[27950]: (CRON) ERROR (setreuid failed): Resource temporarily unavailable
Jun  9 01:40:01 stream2 crond[27950]: (centovacast) ERROR (failed to change user)

A reboot seems to fix things for a while but things go wrong again. ANybody got any ideas what the problem could be?

Thanks

Ben

Just a quick bump because I'm still seeing this error but haven't been able to get to the bottom of it. Has anybody else experienced it?