F15 preupgrade: lots of uneraseable dupes

[linux guy]

I wonder if this thread plays well into the idea

> that upgrading using yum should be scripted by
> an expert so that us mortals do not have to slog
> through this mud :)
>
>
a) My issue was not caused by a yum preupgrade.   It happened by running the
complete install DVD over an existing installation, ie upgrading it.

I've done many upgrades via yum.  I didn't actually use yum preupgrade here
because my laptop wouldn't reboot with the new yum kernel.

As far as I am concerned, yum preupgrade rocks !
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