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/FieldEditor.java
* Initializes this field editor with the default preference value
     * from the preference store.
     */
    public void loadDefault() {
        if (preferenceStore != null) {
            isDefaultPresented = true;
            doLoadDefault();
            refreshValidState();
        }
    }
    /**
     * Returns whether this field editor currently presents the
     * default value for its preference.
     * 
     * @return <code>true</code> if the default value is presented,
     *   and <code>false</code> otherwise
     */
    public boolean presentsDefaultValue() {
        return isDefaultPresented;
    }
    /**
     * Refreshes this field editor's valid state after a value change
     * and fires an <code>IS_VALID</code> property change event if
     * warranted.
     * <p>
     * The default implementation of this framework method does
     * nothing. Subclasses wishing to perform validation should override
     * both this method and <code>isValid</code>.
     * </p>
     *