message: Forgot to turn div displaying error text into an aria-alert in the
  create group dialog.
diff: @@ -108,7 +108,7 @@ export default React.createClass({
  // XXX: We should catch errcodes and give sensible i18ned messages for them,
  // rather than displaying what the server gives us, but synapse doesn't give
  // any yet.
  - createErrorNode = <div className="error">
  + createErrorNode = <div className="error" role="alert">
  <div>{ _t('Something went wrong whilst creating your community') }</div>
  <div>{ this.state.createError.message }</div>
  </div>;
  