Why is my custom 404 not found message not displayed?
If no browser displays your custom 404 Not Found messages, then your server probably is not configured properly.
If only Internet Explorer ignores your custom 404 Not Found messages, then you've been caught by its "friendly" HTTP error messages. When a special HTTP response (e.g., a 404 Not Found response) is shorter than 512 bytes, Internet Explorer substitutes its own message for the one delivered by the server. As a user of Internet Explorer, you can disable this feature in the "Advanced" options panel. As a web author, your only recourse is to make your 404 Not Found message longer.
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