As of Fedora15, a new directory under root was introduced. A couple of quotes:
i.e. /var is "persistant runtime data" and /run is "volatile runtime data", and /etc is "persistant system config data", and so on.
only early boot stuff should use /run, for now
I am running F18 with the default Gnome desktop and am very new to it. This morning I noticed that automounting defaults to /var/media. Why is that? When are /mount, /mnt and /run/mount used?