Bug 73027 [Dialogs] Buttons are too high
I20040831 Buttons are no longer oval but have a rounded rectangle shape (see first screenshot). The second screenshot shows how buttons using the small system font should look like.
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/ListEditor.java
return list;
    }
    /**
     * Creates and returns a new item for the list.
     * <p>
     * Subclasses must implement this method.
     * </p>
     *
     * @return a new item
     */
    protected abstract String getNewInputObject();
    /* (non-Javadoc)
     * Method declared on FieldEditor.
     */
    public int getNumberOfControls() {
        return 2;
    }
    /**
     * Returns this field editor's selection listener.
     * The listener is created if nessessary.
     *
     * @return the selection listener
     */
    private SelectionListener getSelectionListener() {
        if (selectionListener == null)
            createSelectionListener();
        return selectionListener;
    }
    /**
     * Returns this field editor's shell.