I have updated one machine to windows 8.1 preview.  After the update I then installed the remote server management tools for 8.1 as well to get the active directory management tools installed.  I have been testing a cmdlet in powershell 4.0 now and it will not work. I am loading the activedirectory module and I am trying to run the following:

get-aduser -identity username -properties *

When I execute this cmdlt I get the following error:
Get-Aduser : One or more properties are invalid.
Parameter name: msD5-AssignedAuthNPolicy
at line:1 char:1
+ get-aduser -identity zschaffner -properties *
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ Category Info: InvalidArgument: (zschaffner:ADUser) [Get-ADUser], ArgumentException
+ FullyQualifiedErrorId: ActiveDirectoryCmdlet:system.argumentException,microsoft.activedirectory.management.commands.getuser

Any ideas on why this is happening?

I have the same issue.  As near as I can tell, only the cmdlets in the ActiveDirectory module are affected.  They fail to recognize the wildcard (*), so it's trying to find a property named * rather than returning them all.  I posted about this a week or so ago, and have only gotten one "me too" reply so far.

Yes, I'm having the same issue as well.  

Using Windows 8.1 Enterprise Preview, the following code:

Get-ADuser -Identity 'jsmith' -Properties *;

...produces the following error:

---snip---

Get-ADUser : One or more properties are invalid.
Parameter name: msDS-AssignedAuthNPolicy
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidArgument: (:) [Get-ADUser], ArgumentException
    + FullyQualifiedErrorId : ActiveDirectoryCmdlet:System.ArgumentException,Microsoft.ActiveDirectory.Management.Commands.GetADUser

Same error here!