CSS3 Buttons with Rounded corners

For Mozilla:
-moz-border-radius-bottomleft:5px;

-moz-border-radius-bottomright:5px;

-moz-border-radius-topleft:5px;

-moz-border-radius-topright:5px;

background:#222222 url(/images/overlay-button.png) repeat-x scroll 0 0;

border-bottom:1px solid rgba(0, 0, 0, 0.25);

color:#FFFFFF !important;

padding:5px 15px 6px;

text-shadow:0 -1px 1px rgba(0, 0, 0, 0.25);

For Safari and chrome:

-webkit-border-bottom-left-radius: 5px 5px;

-webkit-border-bottom-right-radius: 5px 5px;

-webkit-border-top-left-radius: 5px 5px;

-webkit-border-top-right-radius: 5px 5px;

-webkit-box-shadow: rgba(0, 0, 0, 0.246094) 0px 1px 3px;

http://www.zurb.com/playground/super-awesome-buttons