I installed Tuesday's f19 rsync on a 32 GB i7-3770K and then yum install @virtualization. When I create a virtual machine with the virtual machine manager the manager complains that kvm is missing. I cannot get SCO Openserver 5.07 to see the virtual cdrom. Strangely enough, the same procedure has worked quite well recently.
The VirtualBox .run file worked fine.
Doing the same install on a core duo e6550 does not elicit the complaint about kvm. However, the SCO install grinds to a halt about 3/4 of the way.
Strange.