Quote Originally Posted by talk2amulya View Post
i ran ur code, and it didnt emit any warning.. i m using QT 4.4.3..which version are u using
4.4.0.. did you press Q? that triggers a keypress event which will delete the button from the main window widget. (note the button doesn't do anything if you press it - i just used that cos it takes focus and shows how the events propogate).