Upgrading from F16 to F17 fails

[Alan Cox]

The Fedora DVD upgrade is not very good to put it politely and gets
steadily worse release by release. The installer is pretty robust, but
the update stuff not so.

A better bet is to make a backup and then carefully read the instructions
on updating via yum. Follow all the steps listed in order. 16 to 17 is
the most complicated one of the lot because of the changes to the file
system layout.

The yum update isn't "supported" but works far better than the DVD one.
Given the state of the updater it's not clear what "supported" means in
that context anyway 8(

http://fedoraproject.org/wiki/Upgrading_Fedora_using_yum

Alan