I've added these 6 lines to /etc/fstab on this machine:

/home/larry/isofiles/ubuntu/10.04/ubuntu-10.04.02-desktop-i386.iso
> /mnt/ubu1004DL32    udf,iso9660 user,loop 0 0
> /home/larry/isofiles/ubuntu/10.04/ubuntu-10.04.02-desktop-amd64.iso
> /mnt/ubu1004DL64    udf,iso9660 user,loop 0 0
> /home/larry/isofiles/ubuntu/10.10/ubuntu-10.10-desktop-i386.iso
> /mnt/ubu1010DL32    udf,iso9660 user,loop 0 0
> /home/larry/isofiles/ubuntu/10.10/ubuntu-10.10-desktop-amd64.iso
> /mnt/ubu1010DL64    udf,iso9660 user,loop 0 0
> /home/larry/isofiles/ubuntu/11.04/ubuntu-11.11-desktop-i386.iso
> /mnt/ubu1104DL32    udf,iso9660 user,loop 0 0
> /home/larry/isofiles/ubuntu/11.04/ubuntu-11.11-desktop-amd64.iso
> /mnt/ubu1104DL64    udf,iso9660 user,loop 0 0
>

Problem is that only the middle two seem to work.  The first one (or more)
show an error on screen and give 2 options before the gdm login but gdm
comes up too soon to do anything.  After logging in I find

May  2 19:49:11 fogtest exportfs[1100]: /etc/exports [2]: Neither
> 'subtree_check' or 'no_subtree_check' specified for export
> "*:/images/dev".#012  Assuming default behaviour ('no_subtree_check').#012
> NOTE: this default has changed since nfs-utils version 1.0.x
> May  2 19:49:11 fogtest exportfs[1100]: /etc/exports [3]: Neither
> 'subtree_check' or 'no_subtree_check' specified for export
> "*:/mnt/ubu1004DL32".#012  Assuming default behaviour
> ('no_subtree_check').#012  NOTE: this default has changed since nfs-utils
> version 1.0.x
> May  2 19:49:11 fogtest exportfs[1100]: /etc/exports [4]: Neither
> 'subtree_check' or 'no_subtree_check' specified for export
> "*:/mnt/ubu1004DL64".#012  Assuming default behaviour
> ('no_subtree_check').#012  NOTE: this default has changed since nfs-utils
> version 1.0.x
> May  2 19:49:11 fogtest exportfs[1100]: /etc/exports [5]: Neither
> 'subtree_check' or 'no_subtree_check' specified for export
> "*:/mnt/ubu1010DL32".#012  Assuming default behaviour
> ('no_subtree_check').#012  NOTE: this default has changed since nfs-utils
> version 1.0.x
> May  2 19:49:11 fogtest exportfs[1100]: /etc/exports [6]: Neither
> 'subtree_check' or 'no_subtree_check' specified for export
> "*:/mnt/ubu1010DL64".#012  Assuming default behaviour
> ('no_subtree_check').#012  NOTE: this default has changed since nfs-utils
> version 1.0.x
> May  2 19:49:11 fogtest exportfs[1100]: /etc/exports [7]: Neither
> 'subtree_check' or 'no_subtree_check' specified for export
> "*:/mnt/ubu1104DL32".#012  Assuming default behaviour
> ('no_subtree_check').#012  NOTE: this default has changed since nfs-utils
> version 1.0.x
> May  2 19:49:11 fogtest exportfs[1100]: /etc/exports [8]: Neither
> 'subtree_check' or 'no_subtree_check' specified for export
> "*:/mnt/ubu1104DL64".#012  Assuming default behaviour
> ('no_subtree_check').#012  NOTE: this default has changed since nfs-utils
> version 1.0.x
>

from processing /etc/exports for nfs.  I don't think this means anythoing
about why only 2 of the 6 gets mounted.  Any ideas?

-- 
Dazed_75 a.k.a. Larry

The spirit of resistance to government is so valuable on certain occasions,
that I wish it always to be kept alive.
  - Thomas Jefferson