unwanted mount

[Vassilios Kotoulas]

Hi,

I'm using FC4 with newest updates and gnome desktop. I have a partition
which I don't want to be mounted automatically. Here's the line of
my /etc/fstab:

/dev/hda3               /mnt/hda3               ext3    noauto,user     1 0

When I log in, the partition is mounted. When I unmount it it stays
umounted until I log out/log in again. Then it's mounted again. 
Who mounts this partition at login and how can I turn it off? 
gnome-volume-properties is set up to mount removable drives when
hotplugged and when removable media is inserted. Can this be the cause?

greetings
vassilios