This is a known issue and is scheduled to be fixed in a future release of the core. In the future release, the ability to set the value of 0 for Initial VF and Total VF, when SR-IOV is enabled, will be disabled.
Note: "Version Found" refers to the version where the problem was first discovered. The problem might also exist in earlier versions, but no specific testing has been performed to verify earlier versions.
10/23/2012 - Initial release