I just uploaded beta 1 for the PowerShell Community Extensions version 2.1. This beta drop adds better support for Windows PowerShell V3 that is in the Windows 8 Developer Preview. There are a number of bug fixes in this drop:

• 28023 Read-Archive : Cannot bind parameter ‘Path’. Cannot convert the … value of type “System.String” to type “Pscx.IO.PscxPathInfo”.
  • 28198 Test-XML not validating xml against schema correctly
    • 28964 Get-FileTail access conflict
      • 29255 Get-HttpResource Timeout Bug
        • 29598 String – PscxPathInfo ParameterBindingException

          • 30169 Invoke-Ternary example doesn’t work

            • 30921 Invoke-Elevated demands arguments

            You can download the beta from here.