Consider the following scenario:

  • You run an application on a computer that is running one of the following operating systems:
    • Windows XP
    • Windows Server 2003
    • Windows Vista
    • Windows Server 2008
    • Windows Server 2008 R2
    • Windows 7
  • The application uses Microsoft XML Core Services (MSXML) to process XHTML files.
  • The application generates many requests when it tries to retrieve well known Document Type Definition (DTD) files from a World Wide Web Consortium (W3C) Web server.
  • These redundant retrieval requests cause the W3C server to block the DTD requests.

In this scenario, XHTML parsing fails.

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