SVG transparency rendering problem

There's a problem with SVG rendering with the QSvgRenderer. Transparency is not rendered correctly; areas supposed to be transparent, are displayed as gray/white. Provided example code is used in rendering SVG-graphics. Attached SVG file can be used to verify the problem.

QSvgRenderer doc("path to the svg");
QPixmap pix(size.width(),size.height());
pix.fill(Qt::transparent);

QPainter painter(&pix);
painter.setViewport(0, 0, size.width(), size.height());
doc.render(&painter);

Code has been tested and proven to work on Qt4.6 snapshots released in the beginning of September, but does not work anymore with 4.6 Beta 1