Qt_4.8_Integration #1894: SUCCESS Tested changes (refs/builds/4.8_1399364781): http://codereview.qt-project.org/84714 [PS1] - QMdiArea: Ignore events of other instances in the event filter. http://codereview.qt-project.org/83387 [PS1] - Don't use QAbstractButton::pixmap() as this will always return 0.