Comment 28 for bug 696908

I was embarrassed, too.
However, I was able to 'not to change ownership' by editing the following parameter.

 vi /etc/libvirt/qemu.conf
    139 # Whether libvirt should dynamically change file ownership
    140 # to match the configured user/group above. Defaults to 1.
    141 # Set to 0 to disable file ownership changes.
    142 #dynamic_ownership = 1
    143 dynamic_ownership = 0

But, where this side effect occurs is not understood.
Is it good in this?