https://rhn.redhat.com/errata/RHBA-2013-1749.html
"""
This update fixes the following bug:
* An update to virt-v2v included upstream support for the import of OVA images
exported by VMware servers. Unfortunately, testing has shown that VMDK images
created by recent versions of VMware ESX cannot be reliably supported, thus this
feature has been withdrawn. (BZ#1028983)
Users of virt-v2v are advised to upgrade to this updated package, which fixes
this bug.
"""