src/share/classes/com/sun/java/swing/plaf/windows/WindowsIconFactory.java

*** 690,700 ****
          public Icon getIcon(String type) {
              return new VistaMenuItemCheckIcon(type);
          }
  
          static int getIconWidth() {
!             return XPStyle.getXP().getSkin(null, Part.MP_POPUPCHECK).getWidth()
                  + 2 * OFFSET;
          }
  
          private static Class<? extends JMenuItem> getType(Component c) {
              Class<? extends JMenuItem> rv = null;
--- 690,701 ----
          public Icon getIcon(String type) {
              return new VistaMenuItemCheckIcon(type);
          }
  
          static int getIconWidth() {
!             XPStyle xp = XPStyle.getXP();
!             return ((xp != null) ? xp.getSkin(null, Part.MP_POPUPCHECK).getWidth() : 16)
                  + 2 * OFFSET;
          }
  
          private static Class<? extends JMenuItem> getType(Component c) {
              Class<? extends JMenuItem> rv = null;
*** 756,768 ****
                  Icon icon = getIcon();
                  int height = 0;
                  if (icon != null) {
                      height = icon.getIconHeight() + 2 * OFFSET;
                  } else {
!                     Skin skin =
!                         XPStyle.getXP().getSkin(null, Part.MP_POPUPCHECK);
                      height = skin.getHeight() + 2 * OFFSET;
                  }
                  return height;
              }
  
              public int getIconWidth() {
--- 757,773 ----
                  Icon icon = getIcon();
                  int height = 0;
                  if (icon != null) {
                      height = icon.getIconHeight() + 2 * OFFSET;
                  } else {
!                     XPStyle xp = XPStyle.getXP();
!                     if (xp != null) {
!                         Skin skin = xp.getSkin(null, Part.MP_POPUPCHECK);
                          height = skin.getHeight() + 2 * OFFSET;
+                     } else {
+                         height = 16 + 2 * OFFSET;
+                     }
                  }
                  return height;
              }
  
              public int getIconWidth() {