--- old/src/share/classes/java/awt/Component.java	2009-08-07 10:51:30.000000000 +0200
+++ new/src/share/classes/java/awt/Component.java	2009-08-07 10:51:30.000000000 +0200
@@ -74,6 +74,9 @@
 import sun.awt.EmbeddedFrame;
 import sun.awt.dnd.SunDropTargetEvent;
 import sun.awt.im.CompositionArea;
+import sun.font.FontManager;
+import sun.font.FontManagerFactory;
+import sun.font.SunFontManager;
 import sun.java2d.SunGraphics2D;
 import sun.java2d.pipe.Region;
 import sun.awt.image.VSyncedBSManager;
@@ -2850,8 +2853,12 @@
      * @since     JDK1.0
      */
     public FontMetrics getFontMetrics(Font font) {
-        // REMIND: PlatformFont flag should be obsolete soon...
-        if (sun.font.FontManager.usePlatformFontMetrics()) {
+        // This is an unsupported hack, but left in for a customer.
+        // Do not remove.
+        FontManager fm = FontManagerFactory.getInstance();
+        if (fm instanceof SunFontManager
+            && ((SunFontManager) fm).usePlatformFontMetrics()) {
+
             if (peer != null &&
                 !(peer instanceof LightweightPeer)) {
                 return peer.getFontMetrics(font);