Ubuntu 13.10 - cant make ComboBox with checkable items

Hello, I discovered some problem with make ComboBox with checkable items.
I have used simple code from http://stackoverflow.com/questions/8...of-checkboxes:

Code:

#include <QtGui>
 
int main(int argc, char** argv)
{
    QApplication app(argc, argv);
 
    QStandardItemModel model(3, 1); // 3 rows, 1 col
    for (int r = 0; r < 3; ++r)
    {
        QStandardItem* item = new QStandardItem(QString("Item %0").arg(r));
 
        item->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
        item->setData(Qt::Unchecked, Qt::CheckStateRole);
 
        model.setItem(r, 0, item);
    }
 
    QComboBox* combo = new QComboBox();
    combo->setModel(&model);
 
    QListView* list = new QListView();
    list->setModel(&model);
 
    QTableView* table = new QTableView();
    table->setModel(&model);
 
    QWidget container;
    QVBoxLayout* containerLayout = new QVBoxLayout();
    container.setLayout(containerLayout);
    containerLayout->addWidget(combo);
    containerLayout->addWidget(list);
    containerLayout->addWidget(table);
 
    container.show();
 
    return app.exec();
}

Its generate sample treeview, tableview and combobox view with checkable items.
It works well under windos.

But i compiled it under ubuntu (13.10) and there is a problem wich combo box - the
items are greyed, unable to clik and without the checkbox.

Is there a possibility to make it working uner Ubuntu?