Hi,
If nobody objects, I am going to retire *rubygem-mongrel* and its associated gems rubygem-gem_plugin, rubygem-fastthread and rubygem-mongrel_cluster.
Mongrel is not maintained anymore [1]. It dos not support Ruby on Rails 3 available in Fedora, the last supported Ruby on Rails version was 2.3.7. There are available more viable Ruby web servers such as rubygem-thin. I believe nobody will regret this loss.