Fcron is a scheduler that can replace and is far superior to both 
vixie-cron & anacron. I have often wondered at the relatively small 
level of take up, which I now realise could be a consequence of the rpm 
installation being misconfigured in SL6, and going all the way back to 
RH8. Before discovering this lately I used to have to always re-install 
from raw tarball to get working software.

Fcron has a default installation directory of /etc, and when custom 
installing to some other <DESTDIR> instead, as the RH rpm does, there 
are special instructions to be followed. The RH rpm for fcron does not 
follow those instructions in relation to PAM and, while apparently 
installing ok, ends up broken, with a spurious pam.conf file under 
/usr/local/etc.

Sean