[fedora-virt] Windows XP KVM can't shutdown?

[Tom Horsley <tom horsley att net>]

I just installed a windows XP KVM virtual machine via
fedora 11's virt-manager. All went well, but the KVM
machine can't seem to shutdown, instead I get the
Windows XP screen that says "it is now safe to
power off".

Is there some setting I need to tweak somewhere to enable
XP to power off by itself?