Description of problem: Fedora-11 contains ruby-gnome2-0.19.3-5 while in F12, the release is only up to -4
ruby-gnome2-0.19.3-5.fc12 has been submitted as an update for Fedora 12. http://admin.fedoraproject.org/updates/ruby-gnome2-0.19.3-5.fc12
This often happens when xulrunner is upgraded... Anyway thank you for reporting this issue.
ruby-gnome2-0.19.3-5.fc12 has been pushed to the Fedora 12 stable repository. If problems still persist, please make note of it in this bug report.