Description of problem:
I can't install iso's mounted locally over nfs

Version-Release number of selected component (if applicable):
virt-manager-0.8.0-7.fc12

How reproducible:
every time

Steps to Reproduce:
1. try to install iso mounted on nfs in v-m
  
Actual results:
Error starting domain: internal error unable to start guest: libvir: QEMU error : cannot set ownership on /mnt/iso/fedora-live.iso: Operation not permitted

v

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/engine.py", line 571, in run_domain
    vm.startup()
  File "/usr/share/virt-manager/virtManager/domain.py", line 664, in startup
    self.vm.create()
  File "/usr/lib64/python2.6/site-packages/libvirt.py", line 293, in create
    if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
libvirtError: internal error unable to start guest: libvir: QEMU error : cannot set ownership on /mnt/iso/fedora-live.iso: Operation not permitted


Expected results:
no backtrace and no need to change ownership.