If you are running this against vSphere 5.1, then I can confirm there is a problem.
For vSphere 5.0.* the Onyx 2.1.4226.28167 version is ok.
If you are running this against vSphere 5.1, then I can confirm there is a problem.
For vSphere 5.0.* the Onyx 2.1.4226.28167 version is ok.