Centos 5 Logwatch bug

Centos 5 seems to have a bug in the default version of logwatch that is in the repos. If you are getting :

system cat failed: 256 at /usr/sbin/logwatch line 880

Then, there is a problem wit the cron configuration. Make the following change in file /usr/share/logwatch/default.conf/logfiles/cron.conf line 20 to
Archive = /var/log/cron.*

The problem was that the cron file filter was picking up cron.* (i.e. cron.daily, cron.monthly etc) which was causing a the cat to fail, as they are directories and not simple files.