command line upgrade dapper->hardy failed [python louie fstab uuid]

[evilrob]

when trying to do a 'do-release-upgrade' I got the following error message requesting I file a bug against upgrade-manager:

--------------------------
...
Processing triggers for libc6 ...
ldconfig deferred processing now taking place
Processing triggers for initramfs-tools ...
update-initramfs: Generating /boot/initrd.img-2.6.24-19-server
Errors were encountered while processing:
 python-louie

Could not install the upgrades

The upgrade aborts now. Your system could be in an unusable state. A
recovery will run now (dpkg --configure -a).

Please report this bug against the 'update-manager' package and
include the files in /var/log/dist-upgrade/ in the bugreport.
E:Sub-process /tmp/tmpcAEUYb/backports/usr/bin/dpkg returned an error
code (1)

Setting up python-louie (1.1-1) ...
pycentral: pycentral pkginstall: not overwriting local files
pycentral pkginstall: not overwriting local files
dpkg: error processing python-louie (--configure):
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 python-louie
/etc/fstab.pre-uuid already exists
remove this file before running the script again

Could not install the upgrades

The upgrade aborts now. Your system could be in an unusable state. A
recovery will run now (dpkg --configure -a).

Please report this bug against the 'update-manager' package and
include the files in /var/log/dist-upgrade/ in the bugreport.
installArchives() failed

Setting up python-louie (1.1-1) ...
pycentral: pycentral pkginstall: not overwriting local files
pycentral pkginstall: not overwriting local files
dpkg: error processing python-louie (--configure):
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 python-louie
/etc/fstab.pre-uuid already exists
remove this file before running the script again
--------------------------

for me, this is (seemingly) a low priority, as it seems to be largely resolved (see below). but since update-manager asked me to report the problem, I am.

for insight, if any, into what was going on;
--------------------------
robk$ dpkg -p python-louie
Package: python-louie
Priority: optional
Section: python
Installed-Size: 204
Maintainer: Ubuntu MOTU Developers <email address hidden>
Architecture: all
Source: louie
Version: 1.1-1
Depends: python-central (>= 0.5.8), python (>= 2.3)
Size: 22424
Description: Python signal dispatching mechanism
 Louie provides Python programmers with a straightforward way to
 dispatch signals between objects in a wide variety of contexts. It is
 based on PyDispatcher, which in turn was based on a highly-rated recipe
 in the Python Cookbook.
Original-Maintainer: Loic Minier <email address hidden>
Python-Version: >= 2.3
--------------------------
robk$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# /dev/md0 -- converted during upgrade to edgy
UUID=c8d290df-2a4e-49a7-a1d1-3f9c6ac503ab / ext3 defaults,errors=remount-ro 0 1
/dev/sda3 /data1 ext3 defaults 0 2
/dev/sdb3 /data2 ext3 defaults 0 2
# /dev/md2 -- converted during upgrade to edgy
UUID=bbc06bb7-5582-4e73-bc8a-bbf203c561dc /data3 ext3 defaults 0 2
# /dev/md1 -- converted during upgrade to edgy
UUID=06cb31f5-a816-4daa-beb0-d06a91774aae none swap sw 0 0
/dev/hda /media/cdrom0 udf,iso9660 user,noauto 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto 0 0
robk$ cat /etc/fstab.pre-uuid
# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
/dev/md0 / ext3 defaults,errors=remount-ro 0 1
/dev/sda3 /data1 ext3 defaults 0 2
/dev/sdb3 /data2 ext3 defaults 0 2
/dev/md2 /data3 ext3 defaults 0 2
/dev/md1 none swap sw 0 0
/dev/hda /media/cdrom0 udf,iso9660 user,noauto 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto 0 0
--------------------------

curiously, after moving aside the errant fstab, and re-running the upgrade, it appears that the upgrade did, seemingly, succeed.

--------------------------
robk$ sudo mv /etc/fstab.pre-uuid{,.bak}
robk$ sudo do-release-upgrade
Checking for a new ubuntu release
No new release found
--------------------------
robk$ lsb_release -rd
Description: Ubuntu 8.04.1
Release: 8.04
--------------------------

and lastly, perhaps its something untoward in python-louie
--------------------------
robk$ sudo apt-get install python-louie
Reading package lists... Done
Building dependency tree... Done
python-louie is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0B of additional disk space will be used.
Setting up python-louie (1.1-1) ...
pycentral: pycentral pkginstall: not overwriting local files
pycentral pkginstall: not overwriting local files
dpkg: error processing python-louie (--configure):
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 python-louie
E: Sub-process /usr/bin/dpkg returned an error code (1)
--------------------------

at any rate, I don't need python-louie going forward, so I just removed that package.

just seems a bit curious that the upgrade reported failure and requested a bug report, but seemed to complete nevertheless.

I'm not blocking on this, in fact it seems to be already resolved, but wanted to capture the information in case it's useful.