Session Per user with vCO PowerShell Plugin 1.04 and SSO Authentication

Has anyone managed to get this working?

Everything is fine when using Shared creds/Kerberos. However when I try and add a PS host using "Session per user" I get the following error:

"com.vmware.vim.sso.client.impl.SamlTokenImpl cannot be cast to [C (Dynamic Script Module name : addPowerShellHost#16)"

I'm guessing this is because the PS plugin doesn't understand the SSO token being sent to it.

Thanks in advance!