How to make headers fixed sized? (QTableWidget)

[jpn]

I though that resize mode for headers will do the trick however, after comparison:

verticalHeader()->setResizeMode(QHeaderView::Fixed);
horizontalHeader()->setResizeMode(QHeaderView::Interactive);

verticalHeader()->setResizeMode(QHeaderView::Fixed);
horizontalHeader()->setResizeMode(QHeaderView::Interactive);

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I see absolutely no difference in behaviour -- I mean, both are interactively resizeable.

Something must be mixing it up. QHeaderView::Fixed should do the trick. At least it does for me with Qt 4.2.3 and 4.3.0.