setVisible(false/true) leads to a KERN-EXEC 3 error on Symbian 5.0 and QT 4.6.2

This test application generates a KERN-EXEC 3 error upon changing from portrait to landscape.
This bug only occurs on phones, not the emulator. Tested on Nokia N97 & X6.
This bug was not occuring on Symbian 4.6.1

If we comment out the calls to setVisible(false/true), the error disappears.

void OrientationTest2::landscape()
{
/*

• !!!!Unable to render embedded object: File (NOTICE) not found.!!!!!
• Commenting the following line ( and setVisible(true) ) stops the bug from occuring
  */
  ui.mainScreensGraphicsView->setVisible(false);

setUpdatesEnabled(false);
OrientationSymbian::setLandscapeOrientationOnly();
setUpdatesEnabled(true);

ui.mainScreensGraphicsView->setVisible(true);
}

I have looked for similar bugs, and have not found any, but I may have missed some.