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
*            the control the string will be displayed on
     * @return the string to display, or <code>null</code> if null was passed
     *         in
     * 
     * @since 3.0
     */
    public static String shortenText(String textValue, Control control) {
        if (textValue == null)
            return null;
        GC gc = new GC(control);
        int maxWidth = control.getBounds().width - 5;
        if (gc.textExtent(textValue).x < maxWidth) {
            gc.dispose();
            return textValue;
        }
        int length = textValue.length();
        int pivot = length / 2;
        int start = pivot;
        int end = pivot + 1;
        while (start >= 0 && end < length) {
            String s1 = textValue.substring(0, start);
            String s2 = textValue.substring(end, length);
            String s = s1 + ELLIPSIS + s2;
            int l = gc.textExtent(s).x;
            if (l < maxWidth) {
                gc.dispose();
                return s;
            }
            start--;
            end++;