[libvirt] virsh migrate with libvirt-0.5.1: failed to start listening VM

Hello, I was trying to migrate a KVM/QEMU VM running on a Fedora 10 host to another F10 host. Both machines have identical architectures (x86_64) and are running identical versions of libvirt and KVM (libvirt-0.5.1-2.fc10.x86_64, kvm-74-10.fc10.x86_64). However, the migration fails: # virsh migrate jhrozek-f11-minimal qemu+ssh://someothersystem.example.com/system libvir: QEMU error : operation failed: failed to start listening VM On the target host, the logfile /var/log/libvirt/qemu/jhrozek-f11-minimal.log says: qemu: could not open disk image /var/lib/libvirt/images/jhrozek-f11-minimal.img Which seems rather odd, isn't libvirt supposed to copy the image file? Is this supposed to work? Is there any way to debug the problem? I skimmed through RH Bugzilla and googled a bit but haven't found much clue. Help is appreciated, Jakub