It didn't crash second time but I cannot accept the call because the touchscreen is covered. It is awkward to remove the cover, push the touchbutton and then slip cover back... One trick could be if the name of caller was announced (with flite as in Maemo-mapper) alternating with the ringtone. This way the cover doesn't have to be removed to decide if the call is to be accepted or rejected. Two exposed buttons (+ -) might be used to accept/reject the call with the cover on.