The Oneiric Ocelot upgrade

The latest version of ubuntu was released last week and over the weekend I decided to try upgrading - this desktop was running the ealier version which had already been installed a few weeks, so I thought it would be pretty smooth as I hadn't had too much excuse for tweaking this machine! I think things are now running ok so let me highlight the issues I had:

• The upgrade of samba crashed - it gave a few error messages but didn't stop the overall upgrade - and I've reported bug 875172
• On completion of the upgrade I rebooted all went smoothly but I found that there was no sound - I deleted my .pulse directory adn logged in again and sound was now fixed.
• I use vm from within emacs for my email but occasionally use kmail in the case of graphic/link heavy emails - on Sunday I read a review of email clients in Linux Format magazine which gave kmail a resounding last place so I was thinking about migrating..but to that point I hadn't yet run kmail in the upgraded ubuntu. I tried running kmail and was confronted with a migration dialog - the new kmail uses a different email backend for storing data. Alas the migration failed... so I then started web searching! The problem was that akonadi was failing to start so I couldn't even view kmail with no unmigrated emails! To start akonadi I tried a manual

  akonadictl start

  but that still failed, I did a lot of searching, thought about moving to thunderbird - but there's no easy migration of data there.. and eventually I spotted this bug report which gave this recipe:

  sudo aa-complain mysqld
  sudo aa-complain mysqld-akonadi
  sudo /etc/init.d/apparmor reload
  akonadictl start

  I've not messed around with apparmor before so I wasn't clear as to what it did but I went on trust and the last command started akonadi ok. I started kmail and it ran! but with no data, I shut it down and tried the advertised command

  kmail-migrator --interactive

  But that complains the migration has already been done! You need to read the instructions here:

  If you have already attempted to run the migrator and it failed, you can re-run it manually by first deleting your
  ~/.kde/share/config/kmail-migratorrc file and your
  ~/.kde/share/config/kmail2rc file.
  Then you will need to run the migrator manually by hitting Alt-F2, and entering the following:
  kmail-migrator --interactive
  The program will run, and all your accounts and mails will be moved over to the Akonadi system.

  And following that kmail now runs ok. I hope the collection of the above instructions in one place helps anyone else struggling with the same problem - I don't know whether it's a general problem or just due to the previous configuration of the machine. For comparison,here are my experiences with the upgrade of the previous ubuntu release. One machine upgraded, 2 more to go!