Debian Multimedia :: Why No Desktop Icon With Automount

I have a 2 Computers:
Computer A has a RAID array in it, and everything works perfectly fine. When Computer A powers on, the RAID array is automatically mounted, mdadm takes care of all of the things it's supposed to, and an icon for the RAID array is automatically placed on the desktop. Everything Just Works (TM).
Computer B is configured similarly to Computer A. They have identical configuration files (at least, all the ones I've checked are identical), and when Computer B powers on, the RAID array is automatically mounted, mdadm takes care of all of the things it's supposed to, BUT, NO icon for the RAID array is automatically placed on the desktop. How do I change that?

They have identical /etc/fstab's (the lines in bold are the ones that matter):
Computer A
mediaserver:/home/mediaserver/Desktop# cat /etc/fstab .....

Computer B
mediaserver:/home/mediaserver# cat /etc/fstab
# /etc/fstab: static file system information .....

They have identical /etc/mdadm/mdadm.conf's
Computer A
mediaserver:/home/mediaserver/Desktop# cat /etc/mdadm/mdadm.conf
DEVICE partitions
CREATE owner=root group=disk mode=0660 auto=yes
HOMEHOST <system>
MAILADDR root
ARRAY /dev/md0 level=raid5 num-devices=4 metadata=0.90 UUID=82bfcecf:5cd4d557:2f1fbd23:68e2797c

Computer B
mediaserver:/home/mediaserver# cat /etc/mdadm/mdadm.conf
DEVICE partitions
CREATE owner=root group=disk mode=0660 auto=yes
HOMEHOST <system>
MAILADDR root
ARRAY /dev/md0 level=raid5 num-devices=4 metadata=0.90 UUID=6c24c0e5:84ead07e:c109596b:d7e29b7e

The outputs of mount are also very similar:
Computer A
mediaserver:/home/mediaserver/Desktop# mount
/dev/hda1 on / type ext3 (rw,errors=remount-ro)
tmpfs on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
procbususb on /proc/bus/usb type usbfs (rw)
udev on /dev type tmpfs (rw,mode=0755)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=620)
/dev/md0 on /mnt/arrayCOMP_A type xfs (rw)

Computer B
mediaserver@mediaserver:~$ mount
/dev/hdc1 on / type ext3 (rw,errors=remount-ro)
tmpfs on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
procbususb on /proc/bus/usb type usbfs (rw)
udev on /dev type tmpfs (rw,mode=0755)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=620)
/dev/md0 on /mnt/arrayCOMP_B type xfs (rw)
mediaserver@mediaserver:~$

So how do I get an icon for the device /dev/md0 to automagically appear on the desktop every time the device is mounted (which occurs every time the computer boots up)?