I imagine the problem is with how QApplication handles those key events, so it will hopefully be fixable in Qt Components Hildon by getting access to the QApplication instance and installing an event filter on it. On the other hand, it may be necessary to subclass QApplication and re-implement its event handling, in which case it might be better handling it on a per-application basis (at least temporarily, I think in either case sending a patch upstream is the ideal solution for something like this).