this happens(http://plnkr.co/edit/0x5guGIc5ofmxDyCJ7Sm?p=preview) when there are no `md-button`s used on the page  when you actually use md-button on the page(http://plnkr.co/edit/oOsUEcDjIkNIi9REGxvA?p=preview), it's fine  @crisbeto maybe?