It's always good to do fresh installs, though required less then windows. If this is the same system u have been upgrading since FC5, i would DEFINETLY do a clean install lol.
Its pretty easy to backup home dir and reinstall apps.
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Cheers to the community for all the awsome work :)
HP Proliant N36L Microserver Os: FC19-MATE Ram: 2x4 gig DDR3 1333C8 Video Card: Nvidia GTX520
Main PC Os: FC15, Win7 CPU: Intel i7-2600K Ram: 2x4 gig DDR3 1600C7 Video card: Nvidia EVGA GTX570-OC