Root filesystem / is not remounted readonly before the
effective reboot or shutdown if quotas are active on it,
causing an fsck at each system start.

Normally, /etc/rc.d/init.d/halt contains a
mount -n -o remount,ro /
that seemed to work well in RH6.0, but it seems that now,
quota must be stopped before trying to put / in ro.

Messages are:

mount: / is busy
and then again the same message, caused by "remounting
remaining FS readonly" in the halt script.

So before
mount -n -o remount,ro /
I added a line:
quotaoff -a

It seems to work.
Maybe an initscripts fix should be released, I know of
people that had corrupted datas because of that.