On my system the bullets used by the Pagination control are a bit oval.
It can be seen on Ensemble8.
Weirdly, it happens to some system but not others. Some users see on Linux and so on Mac.
Personally, I see it on Mac, but not on Linux.
Some people see it only when the proxy is not set. (note that Ensemble8 download fonts on background threads).

For me, this shows the problem on Mac:
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.Pagination;
import javafx.stage.Stage;

public class RT36958 extends Application {

    public static void main(String[] args) throws Exception {
        launch(args);
    }

    @Override
    public void start(final Stage stage) throws Exception {
        Pagination pagination = new Pagination(28, 0);
        pagination.getStyleClass().add(Pagination.STYLE_CLASS_BULLET);
        pagination.setPageFactory(pageIndex -> new Label("Page " + pageIndex));
        Scene scene = new Scene(pagination, 800, 600);
        stage.setScene(scene);
        stage.show();
    }
}