Display of return value when stepping out of a function is broken

When stepping out of a function with a return value QtCreator displays the return value so that is is possible to spy the return value even if it is not assigned to a variable. In version 2.4.1 (and also 2.4.0) this feature does not work anymore. The attached pictures show this bug. The pictures are captured immediately after stepping out of the testAttribute() function in within the QWidget::setVisible() function.

While QtCreator 2.2.0 properly shows the return value, QtCreator 2.4.1 only shows the type (bool) but not the content of the returned value.