Some more information:
- the crash occurs when moving the mouse over the window, which inherits from QAbstractItemView (mouseMoveEvent() has not been overloaded)
- there is no probem with Qt 4.2.3 on Ubuntu
- the problem occurs with Qt 4.3.2 on Mac OsX Leopard and Qt 4.3.4 on Linux (don't know the family, colleague's PC)
So could it be a problem from version 4.3 ?