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/dialogs/Dialog.java
* @param key
     *            one of the <code>Dialog.DLG_IMG_* </code> constants
     * @return the standard dialog image
     */
    public static Image getImage(String key) {
        return JFaceResources.getImageRegistry().get(key);
    }
    /**
     * Returns the button created when <code>createButton</code> is called
     * with an ID of <code>IDialogConstants.OK_ID</code>. If
     * <code>createButton</code> was never called with this parameter, or if
     * <code>createButton</code> is overridden, <code>getOKButton</code>
     * will return <code>null</code>.
     * 
     * @return the OK button or <code>null</code>
     * 
     * @see #createButton(Composite, int, String, boolean)
     * @since 2.0
     * @deprecated Use <code>getButton(IDialogConstants.OK_ID)</code> instead.
     *             This method will be removed soon.
     */
    protected Button getOKButton() {
        return getButton(IDialogConstants.OK_ID);
    }
    /**
     * Initializes the computation of horizontal and vertical dialog units based
     * on the size of current font.
     * <p>
     * This method must be called before any of the dialog unit based conversion
     * methods are called.