QtXmlPatterns - QXmlStreamWriter problem

[Bill]

Hi,
I've recently noticed that I'm not getting any output from QXmlStreamWriter...
As I didn't change the code I presume something happened to Qt?

I've even tried this example:

#include <QtGui>
#include <QtXmlPatterns>
 
int main(int argc, char* argv[])
{
    QApplication app(argc, argv);
 
        QFile *file = new QFile("test.xml");
        file->open(QFile::WriteOnly | QFile::Text);
        QXmlStreamWriter xml(file);
        xml.writeStartElement("template");
	xml.writeStartElement("document");
        xml.writeEndElement();
	xml.writeEndDocument();
 
    return 0;
}

#include <QtGui>
#include <QtXmlPatterns>
 
int main(int argc, char* argv[])
{
    QApplication app(argc, argv);
        
        QFile *file = new QFile("test.xml");
        file->open(QFile::WriteOnly | QFile::Text);
        QXmlStreamWriter xml(file);
        xml.writeStartElement("template");
	xml.writeStartElement("document");
        xml.writeEndElement();
	xml.writeEndDocument();
 
    return 0;
}

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It compiles ok, but the file test.xml is empty...
I'm using Kubuntu 9.04. Did anyone notice any problems with Qt4 and XML?

Thanks in advance for your help,

Regards,
Bill