Default props declared on a base class are not found by inheriting classes in IE10. This was observed in react 0.14.7 and 15.1.0. The example and codepen below should help reproduce.
http://codepen.io/anon/pen/zBxBwV?editors=0011
class TestBase extends React.Component {
  constructor(props) {
    super(props);
  }
}
TestBase.defaultProps = {
  message: 'this is a test message',
};
class Test extends TestBase {
  constructor(props) {
    super(props);
  }
  render() {
    return <div>{this.props.message}</div>;
  }
}
ReactDOM.render(
  <Test />,
  document.querySelector('main')
);