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Article ID: 823386 - Last Review: June 20, 2014 - Revision: 5.0

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Symptoms

When Microsoft Internet Explorer receives compressed HTTP data, you may experience one of the following problems:
  • HTML pages may only partially appear, or the pages may not appear at all.
  • Your HTTP connection may stop responding.

Cause

This behavior occurs because Internet Explorer does not read all the data in the HTTP response.

Resolution

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:
http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)
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.

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 tool in Control Panel. Note This fix will be included in Internet Explorer 6.0 Service Pack 2
Internet Explorer 6.0 SP1
   Date         Time     Version        Size    File name
   -------------------------------------------------------
   18-Oct-2003  3:15:28  6.0.2800.1282  484,352 Urlmon.dll
Internet Explorer 6.0 for Windows Server 2003
   Date        Time  Version      Size    File name
   -------------------------------------------------------
   07-Sep-2004 16:08 6.0.3790.209 513,536 Urlmon.dll
The Japanese 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 tool in Control Panel.
   Date         Time     Version        Size    File name
   -------------------------------------------------------
   18-Oct-2003  3:20:32  6.0.2800.1282  484,352 Urlmon.dll
The Korean 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 tool in Control Panel.
   Date         Time     Version        Size    File name
   -------------------------------------------------------
   18-Oct-2003  3:20:48  6.0.2800.1282  484,352 Urlmon.dll

Status

Microsoft has confirmed that this is a problem in Internet Explorer 6.

More information

In Internet Explorer, the Urlmon.dll file uses an internal buffer to read compressed data. Urlmon.dll fills this buffer when more data arrives and empties the buffer when Urlmon’s client, Mshtml, reads data. The bytes that remain to be decoded in the buffer may be small (8 bytes or less) and the data contained in the buffer decompresses to 0 bytes. Frequently, this data is gzip frame data. When Mshtml receives 0 bytes, it thinks that all the data is read and closes the data stream. As a result, the HTML page sometimes appears truncated. Typically, if it is for a referenced file such as a .js or a .css file type, the HTTP connection stops responding. This problem may occur intermittently or consistently, depending on the server configuration. After you apply the hotfix, clear the cache to delete any files that have the incorrect HTTP version.
Keywords: 
kbautohotfix kbhotfixserver kbqfe kbie600sp2fix kbie600presp2fix kbfix kbbug KB823386
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