QFileDialog::setFileMode(QFileDialog::ExistingFiles) cannot select multiple items on Kubuntu.

#if 1
    QFileDialog fooFileDialog;
    fooFileDialog.setDirectory(QDir::homePath());
    fooFileDialog.setFileMode(QFileDialog::ExistingFiles);

    QStringList fooFilters;
    fooFilters << "Any files (*)"
               << "Image files (*.png *.xpm *.jpg)"
               << "Text files (*.txt)";
    fooFileDialog.setNameFilters(fooFilters);

    if(fooFileDialog.exec())
    {
        //qDebug() << "File dialog closed. Selected files are listed below.";
        QStringList fooSelectedFiles = fooFileDialog.selectedFiles();
        foreach(QString fooFileName, fooSelectedFiles)
        {
            qDebug() << "fooFileName:" << fooFileName;
        }
    }

#else
    QStringList fooSelectedFiles =
            QFileDialog::getOpenFileNames(0,
                                          "Select one or more files to open...",
                                          QDir::homePath(),
                                          "Any files (*)",
                                          0,
                                          QFileDialog::DontUseNativeDialog);
    foreach(QString fooFileName, fooSelectedFiles)
    {
        qDebug() << "fooFileName:" << fooFileName;
    }
#endif