Qwt 5.1 + Qt 4.5 - SVG no clipping

[giusepped]

I am trying to export a picture in svg format.
With Qwt 5.1 and Qt 4.4 all worked fine.
But now, if I use Qt 4.5.0 I have a plot outside the clipping region, like in the figure.
All clippings are set in the QwtPlotCurve.
Any idea ?
The code is quite standard

void MyPlot::exportSVG()
{
	QString fileName;
 
 
    fileName = QFileDialog::getSaveFileName(this, tr("Nome file da esportare"),  recentExportPath,"Graphic files ( *svg)");
 
 
 if ( !fileName.isEmpty() )
    {
	fileName = MyMath::checkFormat(fileName,"svg");
        QSvgGenerator generator;
        generator.setFileName(fileName);
        generator.setSize(QSize(1024, 800));
	QwtPlotPrintFilter filter;
   	int options = QwtPlotPrintFilter::PrintAll;
            options |= QwtPlotPrintFilter::PrintBackground;
            options |= QwtPlotPrintFilter::PrintFrameWithScales|QwtPlotPrintFilter::PrintMargin;
	    filter.setOptions(options);
 
 
      print(generator,filter);
    }

void MyPlot::exportSVG()
{
	QString fileName;
 

    fileName = QFileDialog::getSaveFileName(this, tr("Nome file da esportare"),  recentExportPath,"Graphic files ( *svg)");
	
    
 if ( !fileName.isEmpty() )
    {
	fileName = MyMath::checkFormat(fileName,"svg");
        QSvgGenerator generator;
        generator.setFileName(fileName);
        generator.setSize(QSize(1024, 800));
	QwtPlotPrintFilter filter;
   	int options = QwtPlotPrintFilter::PrintAll;
            options |= QwtPlotPrintFilter::PrintBackground;
            options |= QwtPlotPrintFilter::PrintFrameWithScales|QwtPlotPrintFilter::PrintMargin;
	    filter.setOptions(options);
           
 
      print(generator,filter);
    }

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I tried also qwt 5.2 + qt4.5, but a segfault error happens.
G