I have switched a bit earlier to Fedora 20 since I really wanted to have the latest GNOME 3.10 release ;-)
I have spotted two issues with some applications that were working fine in Fedora 19. In order to use the OwnCloud sync client (mirall) or to browse a windows network with Nautilus, I need to desactivate the firewall... (I haven't found yet which ports to open in the firewall)
Should I report it or these kinds of problems are treated later in the development cycle?
Edit : the OwnCloud sync issue is solved with this morning update.