I have the igb-3.3.6 and igbvf-1.1.5 drivers loaded and functioning on a 220.127.116.11-based kernel. It seems to be operating properly, I can transmit/receive traffic through the VF devices.
From what I understand, the PF should report link state to the VF devices, but the VF devices don't seem to be properly reporting link state to the OS. In particular, "ethtool" reports "Link detected: no" and "ip ad" is missing "LOWER_UP" and has a state of "UNKNOWN" instead of "UP":
17: eth12: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000