scene->addItem() moans about QTimer ???

[enno]

I want to move an QGraphicsItem gi in a scene being displayed. I use

scene->removeItem(gi);
gi->setPos(x, y);
scene->addItem(gi);

scene->removeItem(gi);
gi->setPos(x, y);
scene->addItem(gi);

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At that point I get a warning

QObject::startTimer: QTimer can only be used with threads started with QThread

QObject::startTimer: QTimer can only be used with threads started with QThread

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and the view doesn't change. The warning totally foxes me. I have several threads in my program but gdb confirms all the basic GUI thread is active at this point. I don't want a timer, I want the view updated.

What is going on?

At first I had no removeItem addItem calls but that was gave the same warning.

Thanks for any suggestions,
Enno