Yum upgrading FC17

[Alan Cox]

Turns out this can be done although its somewhat scarier than usual

http://fedoraproject.org/wiki/Upgrading_Fedora_using_yum#Fedora_16_-.3E_Fedora_17

It worked on my test box fine. The new Fedora kernel crashes all the
time, the desktop is in fallback mode and also broken but the upgrade
works fine.

Now to pin down what has actually gone wrong and see if it is stable with
the non Fedora-ised 3.4 kernel that ran stably before.

Alan