Which desktop environment do you try to install? You mention about server meaning you might likely run in terminal mode. (CTrl+ALT+F2). It appears you have encounter a bug so you can report it with provided screenshots.
Fluxbox and Blackbox. Most Red Hat based server distros run with a desktop environment, so wrong. No there is no bug, it is a "feature" because anyone who thinks they have the brains to use Fedora is truly retarded. I mean, it has to be one of the most obnoxiously difficult to use distros, yet they think that the people using it won't like basic features such as logging out. The Fedora and Gnome 3 team have a serious sickness. Normally I don't like making rants like this, but this is just batshit insane!