This is an archived snapshot of W3C's public bugzilla bug tracker, decommissioned in April 2019. Please see the home page for more details.
My site uses quite a lot of XML and negotiates whether to use XML+XSLT or XHTML based on the client's Accept header. W3C's CSS validator's Accept header is: Accept: text/css,text/html,text/xml,application/xhtml+xml,application/xml,image/svg+xml,*/*;q=0.1 From which my page selects application/xml and outputs that accordingly: HTTP/1.1 200 OK Content-Type: application/xml; charset=utf-8 But the validator throws an error: I/O Error: Unknown mime type : application/xml;charset=utf-8 Thanks, Aragon
Created attachment 1008 [details] Valid Cascading Style Sheet with single rule: *{display:inline}
Created attachment 1009 [details] Extensible Markup Language document with xml-stylesheet processing instruction and empty root element