[html5] link fails validation - SOLVED

[designer]

I've just discovered that it's fine when it's uploaded, but when I preview 
it if FF3.5.7 locally, then 'view source', the line which fails the 
validation has changed from

<link href="standard.css" rel="stylesheet" type="text/css">

 to:

 <link rel="stylesheet" title="Disabled for Preview-in-Browser: 
standard.css" type="text/css" >

This isn't what it says in my markup, and it doesn't say that if I upload 
it!

However, it appears that it's Dreamweaver CS4 that's doing it. If you use
'preview using temp file' it changes that line - otherwise it's fine. DW 
never used  to do that, which is why it confused me!

Mmm.

Bob