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
buttons = new HashMap();
            buttonBar = null;
            dialogArea = null;
        }
        return returnValue;
    }
    /**
     * Applies the dialog font to all controls that currently have the default
     * font.
     * 
     * @param control
     *            the control to apply the font to. Font will also be applied to
     *            its children. If the control is <code>null</code> nothing
     *            happens.
     */
    public static void applyDialogFont(Control control) {
        if (control == null || dialogFontIsDefault())
            return;
        Font dialogFont = JFaceResources.getDialogFont();
        applyDialogFont(control, dialogFont);
    }
    /**
     * Sets the dialog font on the control and any of its children if thier font
     * is not otherwise set.
     * 
     * @param control
     *            the control to apply the font to. Font will also be applied to
     *            its children.
     * @param dialogFont
     *            the dialog font to set