A Group Policy setting to prevent the tabs from closing does not work in Internet Explorer 9

In your environment, you configure a Group Policy setting to prevent the tabs in Internet Explorer from closing. You expect that, when a tab is closed, a dialog box appears and the tab is prevented from closing. However, on a computer that has Internet Explorer 9 installed, the Group Policy setting does not work.

This problem occurs because Internet Explorer 9 introduces a new feature, known as�fast tab shutdown,�that hides a tab during shutdown. Unfortunately, the code that executes fast tab shutdown runs before the Group Policy Object settings are queried. Therefore, the tab in Internet Explorer 9 is hidden but is not successfully closed.

To resolve this problem, install this update.

Security update information

To resolve this issue, install the most recent cumulative security update for Internet Explorer. To do this, visit the following Microsoft website:For more technical information about the most recent cumulative security update for Internet Explorer, 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:

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: