Mysterious character encoding detection

I get a mysterious error when trying to validate www.cisco.com:
'The detected character encoding was "inline". The error was ""'.

The request is encoded like this: <URL
http://validator.w3.org/check?uri=http%3A%2F%2Fwww.cisco.com%2F&charset=%28detect+automatically%29&doctype=Inline 
>.

Pressing the Revalidate button on the results page will generate 
another erroneous detection: 'http'.

I'm curious to know where the error comes from.  I'm sorry if this is a 
well-known problem, but I could not find any reference to it.

/Per Ångström <per.angstrom@autark.se>

Received on Tuesday, 18 September 2001 20:29:22 UTC