Consider the following scenario:

•	You install security update 916281 on a Microsoft Windows XP-based computer.
•	On the computer, you use Microsoft Internet Explorer 6 to access a Web-based software program.
•	This software program was created by using Microsoft ASP.NET. Also, this software program uses the SmartNavigation feature.

In this scenario, the software program cannot import an external style sheet. This problem occurs only after you install security update 916281.

Note Security update 916281 is described in security bulletin MS06-021.

For more information about security bulletin MS06-021, click the following article number to view the article in the Microsoft Knowledge Base:

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Service pack information

To resolve this problem, obtain the latest service pack for Windows Vista. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

You must be running Windows XP with Service Pack 2 (SP2) or Windows XP with Service Pack 1 (SP1) to install this hotfix.

Restart requirement

You do not have to restart the computer after you apply this hotfix. However, you have to restart Internet Explorer 6.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows XP with SP2

File name	File version	File size	Date	Time	Platform
Mshtml.dll	6.0.2900.3009	3,060,736	05-Oct-2006	12:14	x86

Internet Explorer 6

File name	File version	File size	Date	Time	Platform
Iecustom.dll	6.0.2800.1502	36,864	19-Apr-2005	09:26	x86
Mshtml.dll	6.0.2800.1581	2,711,040	04-Oct-2006	07:51	x86

Enable the hotfix

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

After you install the hotfix, you must create a registry key to enable the hotfix. To do this, follow these steps:

1.	Click Start, click Run, type regedit, and then click OK.
2.	In the left pane, locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl Note If any of the registry subkeys are not present on the computer, create them.
3.	On the Edit menu, point to New, and then click Key.
4.	Type FEATURE_EXTERNAL_STYLE_SHEET_FIX_FOR_SMARTNAVIGATION_KB926131, and then press ENTER.
5.	On the Edit menu, point to New, and then click DWORD Value.
6.	Type iexplore.exe, and then press ENTER.
7.	On the Edit menu, click Modify.
8.	In the Value data box, type 1, and then click OK.
9.	Exit Registry Editor.

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows Vista Service Pack 1.

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For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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