Error: 406: Not Acceptable

[Fonz]

I just ran my linkbot and got this error I've never seen before. A few hundred freesites all on one domain got flagged "Error: 406: Not Acceptable". But if I click the links (pe. http://www.boobshun.com/fs/sex-porn-xxx/ ) the freesite loads. Why am I getting the 406 errors, Am I overlooking something here?

[Sleep[Walker]]

406 header means your server detected that a client (your browser, etc.) can't admit characteristics of the 'Accept Header' which include:
Accept-Charset
Mime Types
Accept-Encoding
Accept-Language
Accept-Ranges
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Try to query one of your sites with 406 from the browser here (http://www.rexswain.com/httpview.html). If your receive code 200 OK, than the problem is with a linkbot.