In the July 29 to August 12th Hot-fix release for Windows 6/7 there have been a number of Group Policy related hotfixes released. As far as I can tell none of these hotfixes are listed as being in Windows 7 Service Pack 1 that is currently in beta (see The complete list of Group Policy Hotfix’s in Windows 7/2008 R2 Service Pack 1) so if you are experiencing any of the above hotfixes it will be some time before you will be able to deploy them as part of a service pack.

• KB2250489 You cannot turn off the screen saver in the Windows Mobility Center when the "Prevent changing wallpaper" Group Policy setting is enabled on a computer that is running Windows Vista SP2
• KB2261826 You cannot find a network drive in the "Browse For Folder" dialog box in the GPMC MMC snap-in on a computer that is running Windows Server 2008 or Windows Vista
• KB2096902 Virtual machines in a VDI environment are not rolled back as expected if the disconnected Remote Desktop connections on the virtual machines are stopped by Group Policy
• KB2254754 You experience a GPO report-generation issue in the GPMC window when you try to generate the report in a localized version of Windows 7 or of Windows Server 2008 R2
• KB2258620 You cannot find the "Find Now," "Stop," and "Clear All" buttons in the GPMC snap-in on a computer that is running Windows 7 or Windows Server 2008 R2
• KB2275315 You cannot read the GPO in the SYSVOL directory in Windows 7 or in Windows Server 2008 R2 if you enable the "Deny write" permission of the GPO
• KB2284538 Apply once and do not reapply Group Policy setting is never applied after the first GPO deployment fails on a client computer that is running Windows 7 or Windows Server 2008 R2

Source: Jul. 29 – Aug. 12 Hot-Fix KB articles Weekly Release – Windows 6/7 – The Hot Blog – Site Home – TechNet Blogs