Umlauts are rendered as different letters if text starts with "symbol"

Starting with Qt 5.2.0, text that starts with some "symbol" or "operator" character renders following umlaut characters as different characters (see attached screenshot). If the text is preceded by some other character, all characters are rendered as expected. This happens both with QtQuick's Text element and QtWidgets' QLabel widget. I have attached a small example program.

The problem goes away (for QtQuick) if a QGuiApplication is used instead of a QApplication.

The text is displayed as expected with Qt 5.1.1 (see attached screenshot).