Standards mode and css link
Interesting trick with standards mode. Given you have a correct doctype entry (I’m using html5′s <!doctype html>) and your link to stylesheet is ambiguous (going bleeding edge here by calling my stylesheet ‘s’, instead of ‘s.css’ and you leave off the type=”text/css”, Firefox 3.0.x won’t render your sheet.
Even though the default document type for a style link is “text/css”, it doesn’t work. The reason, I think, is in the server sending ‘s’ as text instead of ‘text/css’. The cool thing is a file named s.css means the server will send the file as mime type text/css thanks to ‘magic’ and you can leave off the type in the link element.