QPushButton with icon in CleanLooks style doesn't show text correctly

If you have a QPushButton with a large text and an icon set, under Cleanlooks style, resizing the button to a smaller size produce some hides some part of the text.
To reproduce with the Designer:
Create a QWidget
Add a QPushButton in a vertical layout
set a long string as text (+20 characters)
set an icon to the button
Change the horizontal sizepolicy of the button to ignored
Preview in Cleanlooks,
resize the widget/button
->the text is "eaten" by the right...