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Horizontal scrolling in Internet Explorer 9 is slower than in Internet Explorer 8

Symptoms
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:
  • You disable the Use smooth scrolling option. To locate this option, click Internet Options on the Tools menu, and then click the Advanced tab.
  • Or, you use a pointing device that uses MouseWheel messages to scroll horizontally.

Cause
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.
Resolution
To resolve this problem, install this update.

Security update information

To resolve this problem, 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 2722913.

For more information about the security update, click the following article number to view the article in the Microsoft Knowledge Base:
2722913 MS12-NNN: Cumulative Security Update for Internet Explorer: August 14, 2012

Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
More information
For more information, visit the following Microsoft Developer Network (MSDN) websites: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
Properties

Article ID: 2736643 - Last Review: 08/14/2012 21:17:00 - Revision: 1.0

Windows Internet Explorer 9

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