When you use the following Group Policy to configure the Pop-up allow list option for Internet Explorer 9, the pop-up window does not work as expected:
User Configuration\Administrative Templates\Windows Component\Internet Explorer\Pop-up allow listHowever, if you use the following registry subkey to configure the binary data for the Pop-up allow list option, the pop-up window works as expected:
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\New Windows\Allow
Security update informationTo resolve this issue, install the most recent cumulative security update for Internet Explorer. To do this, visit the following Microsoft website:Note This update was first included in security update 2618444.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
2618444 MS11-099: Cumulative Security Update for Internet Explorer: December 13, 2011
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates