Microsoft has released the following KB article:
Description of Windows PowerShell changes in Cumulative Update 1 for System Center 2012 R2 Configuration Manager
Summary:
This article describes the Windows PowerShell issues that are fixed in Cumulative Update 1 (CU1) for Microsoft System Center 2012 R2 Configuration Manager. Other CU1 fixes are described in the following Microsoft Knowledge Base article:
2938441 Description of Cumulative Update 1 for System Center 2012 R2 Configuration Manager
Full details at:
http://support.microsoft.com/kb/2932274