This field is just an incorrect spelling of the standard field Content-Type. (Correct syntax require a "-" between the two words, not a space!)
This spelling is not supported by any know client.
NOTE: this header may be sent directly by the server software or from some third party application running on that server.
HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Content-Length: 5311
Content Type: text/html
Date: Fri, 30 Jul 2010 17:04:18 +0000
<!DOCTYPE html PUBLIC "-//W3C//DTD ...
...
...