An alternate view:
  I went through the upgrade process this weekend as well, unfortunately it wasn't quite as smooth for me.
I strongly recommend that anyone who has installed applications from universe run the upgrade using the apt-get method, and make SURE you're in single-user mode (init 1) when you run it.
I had a TON of conflict issues because I tried to run the simple method using upgrade-manager (the price of laziness, I guess).  I had to drop into single-user mode and rerun the whole process using
apt-get dist-upgrade, at which point everything went in just fine.  One other note, based on the types of failures I had, DON"T attempt to restart the machine if something goes wrong, you could
very well end up with an unbootable system.  Use Ctrl-Alt-F1 and go into single user mode from there if you have problems, most of the conflict issues I had happened after critical items, like udev and hotplug
were removed, and before the replacements were configured, so the system was distinctly unreliable at that point.

One minor correction:  Firefox and Thunderbird are 1.5, not 3.5 (3.5 won't be out until at least around mid-2008, based on the latest roadmap discussions).

==Joseph++

Jeff Garland wrote:
> Small contribution for those Ubuntu users thinking of upgrading to 6.06.
> 
> Short story -- I went thru the process today.  It was completely
> painless -- it worked perfectly.  The upgrade has some really nice
> software upgrades including an upgrade to Firefox 3.5 and Thunderbird
> 3.5. Do it!
> 
> Longer story -- I was mostly a Mandrake user for several years (I still
> have a Mandrake machine), but recently I built a new AMD64 machine and
> installed the 5.10 -- 64 bit version of Ubuntu (thx for the prize at the
> dev meeting!).  I was a little disappointed since 5.10 had a very old
> version of Firefox.  Of course, compared to Mandrake the combination of
> apt and the graphical counterparts, Ubuntu is so, so, so nice to keep
> updated with the latest software.  After several nightmares with
> Mandrake upgrades, I was apprehensive, but the major upgrade from 5.10
> to 6.06 didn't disappoint.  I can honestly say that this was the easiest
> major upgrade of an OS/Applications ever in my life -- just kicked it
> off, kept working away for about 30 minutes while the downloads were
> going, and then one reboot, and back to business.  Sweet.
> 
> In case no one noticed, this is a place where Linux has a major lead on
> MS right now -- yes, you can get 64bit Windows, but try to find device
> drivers and applications -- it's tough.  On top of that, the idea of
> installing a major OS upgrade and having it automatically upgrade all
> the apps -- well, that just can't happen on Windows. Anyway, many thanks
> to all the folks that made this one fleeting moment of software euphoria
> possible :)
> 
> Jeff
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