Content-disposition is described in http://www.faqs.org/rfcs/rfc2183. It is also mentioned in the "Security considerations" section of the HTTP spec (http://www.faqs.org/rfcs/rfc2616), although it's not clear what security considerations it's talking about.
Btw, I'm not sure I agree with the way you equate "non-standard" with "wrong".
Content-disposition is described in http:// www.faqs. org/rfcs/ rfc2183. It is also mentioned in the "Security considerations" section of the HTTP spec (http:// www.faqs. org/rfcs/ rfc2616), although it's not clear what security considerations it's talking about.
Btw, I'm not sure I agree with the way you equate "non-standard" with "wrong".