MapCircle leaks memory

Adding and removing dynamically created MapCircle objects to a Map does not free all allocated memory. Around 8 kB per MapCircle is not freed.

From the attached example:
...
function createIcon(lat,lon)
{
var icon = Qt.createQmlObject('import QtQuick 1.1; import QtMobility.location 1.2; ' +
'MapCircle{ radius: 100; color: "'+ mainPage.iconColor + '"; ' +
'center: Coordinate

{latitude: ' + lat + '; longitude: ' + lon + '}

' + ' } ',
mainPage);
if (icon !== null)

{ map.addMapObject(icon); MapHelper.mapObjects.push(icon); }

}
function updateMap()
{
clearMap();
for (var x= -10; x<10; x++ )
for (var y= -5; y<5; y++ )

{ var lat = 52.45705 + x * 0.01; var lon = 13.41173 + y * 0.01; createIcon(lat,lon); }

}
function clearMap()
{
while ( MapHelper.mapObjects.length > 0 )

{ var mapObj = MapHelper.mapObjects.pop(); map.removeMapObject(mapObj); mapObj.destroy(); }

}
...