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diff -up qt-everywhere-opensource-src-4.8.2/tools/assistant/tools/assistant/mainwindow.cpp.me qt-everywhere-opensource-src-4.8.2/tools/assistant/tools/assistant/mainwindow.cpp
--- qt-everywhere-opensource-src-4.8.2/tools/assistant/tools/assistant/mainwindow.cpp.me 2012-06-19 12:52:22.740180410 +0200
+++ qt-everywhere-opensource-src-4.8.2/tools/assistant/tools/assistant/mainwindow.cpp 2012-06-19 12:52:51.953194103 +0200
@@ -944,8 +944,7 @@ void MainWindow::updateApplicationFont()
if (helpEngine.usesAppFont())
font = helpEngine.appFont();
- const QWidgetList &widgets = qApp->allWidgets();
- foreach (QWidget* widget, widgets)
+ foreach (QWidget* widget, QApplication::allWidgets())
widget->setFont(font);
}