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Article ID: 843289 - Last Review: May 30, 2013 - Revision: 3.0

Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756  (http://support.microsoft.com/kb/322756/ ) How to back up and restore the registry in Windows

Symptoms

You are using a proxy script to determine the proxy server settings for a connection in Windows Internet Explorer 7, in Microsoft Internet Explorer 6 Service Pack 2 (SP2), or in Internet Explorer 6 Service Pack 1 (SP1). However, after the proxy script is downloaded from the server, the proxy server settings in Internet Explorer are not set correctly. You may have to manually configure the proxy server settings.

Cause

This problem occurs if the following conditions are true:
  • The proxy script is split in two frames by using chunk encoding.
  • The second frame only has the endmarker of the chunk.
In this scenario, Internet Explorer incorrectly processes the script.

Resolution

To resolve this issue, install security update 942615 for Internet Explorer. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
942615  (http://support.microsoft.com/kb/942615/ ) MS07-069: Cumulative security update for Internet Explorer
Important By default, if you are running Windows Internet Explorer 7, the fix for this problem is enabled after you install the update. If you are running Internet Explorer 6 SP2 or Internet Explorer 6 SP1, you must enable the fix after you install this update.

Enable the fix if you are running Internet Explorer 6 SP2 or Internet Explorer 6 SP1

If you are running Internet Explorer 6 SP2 or Internet Explorer 6 SP1, you must enable the fix after you install the update. To do this, follow these steps.

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.
  1. Click Start, click Run, type regedit, and then click OK.
  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 DWORD Value.
  4. Type FEATURE_FIX_CHUNKED_PROXY_SCRIPT_DOWNLOAD_KB843289, and then press ENTER.
  5. On the Edit menu, click Modify.
  6. In the Data value box, type 1, and then click OK.
  7. On the File menu, click Exit to exit Registry Editor.

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 about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684  (http://support.microsoft.com/kb/824684/LN/ ) Description of the standard terminology that is used to describe Microsoft software updates

Applies to
  • Windows Internet Explorer 7
  • Windows Internet Explorer 7 for Windows XP
  • Windows Internet Explorer 7 for Windows Server 2003
  • Windows Internet Explorer 7 in Windows Vista
Keywords: 
atdownload kbvistasp1fix kbexpertiseinter kbbug kbfix kbqfe KB843289
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