Even the simplest test case using a QTreeView crashes, with MSVC 2010 sp1 in 64 Bit release mode:

 
#include <QTreeView>
#include <QApplication>

int main(int argc, char* argv[])
{
	QApplication app(argc, argv);
	QTreeView fileView;
	fileView.show();
	return app.exec();// crashes here
}

Qt 4.7.3 is not affected

Error is:
"Unhandled exception at 0x5a320bbf in crashtest.exe: 0xC0000005: Access violation reading location 0x0000000000000000."
The address refers to QtGui4.dll.