When you work in a WYSIWYG HTML-editing environment, Internet Explorer 6 may crash because of an access violation in the Mshtml.dll module

Consider the following scenario:

• You are running a Windows XP-based computer that has Microsoft Internet Explorer 6 installed.
• In Internet Explorer, you visit a Web page that contains a "what you see is what you get" (WYSIWYG) HTML-editing environment.

In this scenario, Internet Explorer may crash because of an access violation.

When the issue occurs, you receive an error message that resembles the following: If you click click here to see the detail information, you see the following error signature:Additionally, an event that resembles the following is logged in Application log:Note In this event, the Mshtml.dll file version and the fault address may vary.

To resolve this problem, install the hotfix files in the most current cumulative security update for Internet Explorer. For more technical information about the most current cumulative security update for Internet Explorer, visit the following Microsoft Web site: For more information about how to install the hotfix files in a cumulative security update for Internet Explorer, click the following article number to view the article in the Microsoft Knowledge Base: Note This update was first included in security update 953838 (MS08-045). For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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

To apply this hotfix, you must have Windows XP SP2 installed.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other previously released hotfixes.

Registry information

To enable this hotfix, follow these steps. Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

1. Click Start, click Run, type regedit, and then press ENTER.
2. Locate and then click the following registry subkey:
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\MAIN\FeatureControl
3. On the Edit menu, point to New, and then click Key.
4. Type FEATURE_CLONENODE_ATTRIBUTES_KB949922 to name the new registry subkey, and then press ENTER.
5. On the Edit menu, point to New, and then click DWORD Value.
6. Type iexplore.exe to name the new registry entry, and then press ENTER.
7. On the Edit menu, click Modify.
8. Type 1, and then click OK.
9. Exit Registry Editor.

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.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

For more information about the HTML-editing environment, visit the following Microsoft Web site: For more information, click the following article number to view the article in the Microsoft Knowledge Base: