IE8's new "standards mode" meta tag
In case you haven't already heard, IE8 is including a new "super standards mode" meta tag. This tag will be required if you want pages to be rendered using their new and improved standards compatibility mode. This was done to ensure that sites designed for older versions of IE won't break in newer versions.
I haven't had a chance to read the ALA articles yet but I'm thinking this can't be a good thing. Now you need to intentionally switch the browser to make it render standards properly, and will have to do so basically forever.