Symbian/Simulator QRasterPaintEngine::drawTextItem produces a crash when trying to render Asian fonts, after displaying a web site with a particular font

This happens when running a Qt app on Symbian and Simulator.
After loading a Chinese/Korean translation and than using a QWebView to display "http://www.adidas.com/us/micoach/", the Qt crashes with a segmentation fault when trying to redraw the UI text.

The crash occurs because the website loads some custom fonts:

/**
 * @Font Settings		Global font settings for AdiHuas
 **/

@font-face {
    font-family: 'AdiHausBold';
    src: url('fonts/adihdb__-webfont.eot');
    src: url('fonts/adihdb__-webfont.eot?#iefix') format('embedded-opentype'),
         url('fonts/adihdb__-webfont.woff') format('woff'),
         url('fonts/adihdb__-webfont.ttf') format('truetype'),
         url('fonts/adihdb__-webfont.svg#') format('svg');
    font-weight: normal;
    font-style: normal;
}

@font-face {
    /*font-family: 'AdiHausPSMd';*/
    font-family: 'AdiHaus';
    src: url('fonts/adihausps-md-webfont.eot');
    src: url('fonts/adihausps-md-webfont.eot?#iefix') format('embedded-opentype'),
         url('fonts/adihausps-md-webfont.woff') format('woff'),
         url('fonts/adihausps-md-webfont.ttf') format('truetype'),
         url('fonts/adihausps-md-webfont.svg#AdiHausPSMd') format('svg');
    font-weight: normal;
    font-style: normal;
}

.adiHaus { font-family:"AdiHaus",Helvetica,Arial,sans-serif !important; }

This is the debug dump:
0 QRasterPaintEngine::drawTextItem qpaintengine_raster.cpp 3404 0x7ffff404b6f4
1 QPainter::drawTextItem qpainter.cpp 6566 0x7ffff3fd1ebe
2 QTextLine::draw qtextlayout.cpp 2375 0x7ffff40def37
3 QTextLayout::draw qtextlayout.cpp 1305 0x7ffff40da6c8
4 QDeclarativeTextLayout::draw qdeclarativetextlayout.cpp 349 0x7ffff7940e23
5 QDeclarativeTextPrivate::drawTextLayout qdeclarativetext.cpp 525 0x7ffff79180bf
6 QDeclarativeText::paint qdeclarativetext.cpp 1594 0x7ffff791a6c1
7 QGraphicsScenePrivate::draw qgraphicsscene.cpp 4962 0x7ffff453eac1
8 QGraphicsScenePrivate::drawSubtreeRecursive qgraphicsscene.cpp 4855 0x7ffff453e46c
9 QGraphicsScenePrivate::draw qgraphicsscene.cpp 4981 0x7ffff453ec05
10 QGraphicsScenePrivate::drawSubtreeRecursive qgraphicsscene.cpp 4855 0x7ffff453e46c
11 QGraphicsScenePrivate::draw qgraphicsscene.cpp 4981 0x7ffff453ec05
12 QGraphicsScenePrivate::drawSubtreeRecursive qgraphicsscene.cpp 4855 0x7ffff453e46c
13 QGraphicsScenePrivate::draw qgraphicsscene.cpp 4981 0x7ffff453ec05
14 QGraphicsScenePrivate::drawSubtreeRecursive qgraphicsscene.cpp 4855 0x7ffff453e46c
15 QGraphicsScenePrivate::drawItems qgraphicsscene.cpp 4737 0x7ffff453d83b
16 QGraphicsView::paintEvent qgraphicsview.cpp 3469 0x7ffff456b5d3
17 QDeclarativeView::paintEvent qdeclarativeview.cpp 714 0x7ffff7831433
18 QWidget::event qwidget.cpp 8458 0x7ffff3eda16d
19 QFrame::event qframe.cpp 557 0x7ffff42e5475
20 QAbstractScrollArea::viewportEvent qabstractscrollarea.cpp 1043 0x7ffff438c01f

And this is the Qt code that fires the segmentation fault

#if defined(Q_WS_QWS) || defined(Q_WS_SIMULATOR)
    if (fontEngine->type() == QFontEngine::Box) {
        fontEngine->draw(this, qFloor(p.x() + aliasedCoordinateDelta), qFloor(p.y() + aliasedCoordinateDelta), ti);
        return;
    }

    if (s->matrix.type() < QTransform::TxScale
        && (fontEngine->type() == QFontEngine::QPF1 || fontEngine->type() == QFontEngine::QPF2
            || (fontEngine->type() == QFontEngine::Proxy
                && !(static_cast<QProxyFontEngine *>(fontEngine)->drawAsOutline()))
            )) {
        fontEngine->draw(this, qFloor(p.x() + aliasedCoordinateDelta), qFloor(p.y() + aliasedCoordinateDelta), ti);
        return;
    }
#endif // Q_WS_QWS