Print QWebView Error

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The first page of the print out of a QWebView with small fonts and images.

Note: The error occurs in "windows 7" (not tested on other platforms)
Note: Qt5.0.2, Windows 7 64bit

The other pages are normal view a ScreenShot error:
TXCp8.jpg

Source:

QPrinter p;
    p.setPaperSize(QPrinter::A4);
    p.setFullPage(true);
    p.setResolution(300);
    p.setOrientation(QPrinter::Portrait);
 
    QPrintPreviewDialog preview(&p);
    preview.setWindowTitle(ui->myWebView->page()->mainFrame()->title());
    connect(&preview, SIGNAL(paintRequested(QPrinter*)), this, SLOT(printPreview(QPrinter*)));
    preview.exec();
 
    ...
 
    void printPreview(QPrinter *printer) {
        ui->myWebView->print(printer);
    }

QPrinter p;
    p.setPaperSize(QPrinter::A4);
    p.setFullPage(true);
    p.setResolution(300);
    p.setOrientation(QPrinter::Portrait);

    QPrintPreviewDialog preview(&p);
    preview.setWindowTitle(ui->myWebView->page()->mainFrame()->title());
    connect(&preview, SIGNAL(paintRequested(QPrinter*)), this, SLOT(printPreview(QPrinter*)));
    preview.exec();
    
    ...
    
    void printPreview(QPrinter *printer) {
        ui->myWebView->print(printer);
    }

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I used QPageSetupDialog and corrected in QPrintPreviewDialog but when printing on paper the error happens again.

I also tried using this:

QPrinter p;
    p.setPaperSize(QPrinter::A4);
    p.setFullPage(true);
    p.setResolution(300);
    p.setOrientation(QPrinter::Portrait);
 
    QPrintPreviewDialog preview(&p);
    preview.setWindowTitle(ui->myWebView->page()->mainFrame()->title());
    connect(&preview, SIGNAL(paintRequested(QPrinter*)), ui->myWebView, SLOT(print(QPrinter*)));
    preview.exec();

QPrinter p;
    p.setPaperSize(QPrinter::A4);
    p.setFullPage(true);
    p.setResolution(300);
    p.setOrientation(QPrinter::Portrait);

    QPrintPreviewDialog preview(&p);
    preview.setWindowTitle(ui->myWebView->page()->mainFrame()->title());
    connect(&preview, SIGNAL(paintRequested(QPrinter*)), ui->myWebView, SLOT(print(QPrinter*)));
    preview.exec();

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But the error persists.

How to solve? Thanks.