In January 2008 Microsoft announced that if you wanted IE8 to operate in standards mode, a meta element must be inserted into the head of your document.
There was a huge uproar.
On 3rd March 2008, The Microsoft development team had a change of heart.
We’ve decided that IE8 will, by default, interpret web content in the most standards compliant way it can. This decision is a change from what we’ve posted previously.
Today, Hakon Lie writes that Microsoft’s IE8 breaks this interoperability promise.
Interesting times again.