Article ID: 2736643 - View products that this article applies to.
When you use the keyboard arrow keys or you use a pointing device to scroll horizontally in Windows Internet Explorer 9, the rate of movement may be noticeably slower than when you perform the same procedure in Windows Internet Explorer 8.
This behavior is not as noticeable when either of the following conditions is true:
This problem occurs when a pointing device uses keyboard messages to scroll horizontally. This occurs because the scaling that is used for keyboard-based horizontal scrolling is set to a lesser value in Internet Explorer 9 than the value that was used in Internet Explorer 8.
To resolve this problem, install this update.
Security update informationTo resolve this problem, install the most recent cumulative security update for Internet Explorer. To do this, visit the following Microsoft website:
http://update.microsoft.comFor more technical information about the most recent cumulative security update for Internet Explorer, visit the following Microsoft website:
http://www.microsoft.com/technet/security/current.aspxNote This update was first included in security update 2722913.
For more information about the security update, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/2722913/ )MS12-NNN: Cumulative Security Update for Internet Explorer: August 14, 2012
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information, visit the following Microsoft Developer Network (MSDN) websites:
Mouse Input NotificationsFor more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
Keyboard Input Notifications
(http://support.microsoft.com/kb/824684/ )Description of the standard terminology that is used to describe Microsoft software updates