IE9 border-radius shorthand not supported?

Question

I have a few things I\'ve made in the past that have the border-radius attribute like this:

border-radius: 7px;

This is not working in IE9. I t

Answer 1

I'm no expert, but when ever I use

 or even

the W3C VALIDATION

checker in Dreamweaver CS5.5 kicks it back, stating the following

"Bad value X-UA-Compatible for attribute http-equiv on element meta. [HTML5]"