Description of problem:
Trying to shut down a guest OS, either by killing the qemu process, gracefully shutting down the guest, or forcing the guest to shut down via virt-manager's "Force Off" option, the host will hang.

Version-Release number of selected component (if applicable):
qemu-1.4.2-4.fc19.x86_64
kernel-3.9.9-301.fc19.x86_64
virt-manager-0.10.0-1.fc19.noarch
libvirt-1.0.5.2-1.fc19.x86_64

How reproducible:
Most of the time.

Steps to Reproduce:
1. Use virt-manager to create a VM with default settings.
2. Install an OS (I used Windows 7 Pro -- unsure if other guests may behave differently)
3. After the install is complete, power cycle the guest a few times.

Actual results:
After a few power cycles, the host will freeze up. Any subsequent power cycles of the guest will cause the host to hang.

Expected results:
Microsoft sues me for mis-typing the product key.

Additional info:
The behavior of the hang is similar to that described in Bug 983814, however, unlike 983814, it happens with both kvm-intel (Nehalem host CPU) and kvm-amd (A10-4600M host CPU) modules.