other paritions show two icons

fstab and mtab:

graham@localghost:~ | cat /etc/fstab
# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# /dev/hda3 -- converted during upgrade to edgy
UUID=f867a5a5-4fe7-4e78-91bb-0c6b54a35fa5 / ext3 defaults,errors=remount-ro 0 1
# /dev/hda1 -- converted during upgrade to edgy
UUID=06188FD6188FC2E3 /media/hda1 ntfs defaults,nls=utf8,umask=007,gid=46 0 1
# /dev/hda5 -- converted during upgrade to edgy
UUID=30610f9f-8108-4400-8a53-c67b860840b7 none swap sw 0 0
/dev/hdc /media/cdrom0 udf,iso9660 user,noauto 0 0
graham@localghost:~ | cat /etc/mtab
/dev/hda3 / ext3 rw,errors=remount-ro 0 0
proc /proc proc rw,noexec,nosuid,nodev 0 0
/sys /sys sysfs rw,noexec,nosuid,nodev 0 0
varrun /var/run tmpfs rw,noexec,nosuid,nodev,mode=0755 0 0
varlock /var/lock tmpfs rw,noexec,nosuid,nodev,mode=1777 0 0
udev /dev tmpfs rw,mode=0755 0 0
devshm /dev/shm tmpfs rw 0 0
devpts /dev/pts devpts rw,gid=5,mode=620 0 0
lrm /lib/modules/2.6.17-7-generic/volatile tmpfs rw 0 0
/dev/hda1 /media/hda1 ntfs rw,nls=utf8,umask=007,gid=46 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0

I can confirm this happens in Gnome in Edgy Knot-3.

This bug is duplicate to bug #57701 I think.