src/macosx/classes/sun/lwawt/LWWindowPeer.java

*** 1150,1160 ****
--- 1150,1162 ----
          // - when the opposite (gaining focus) window is an owned/owner window.
          // - for a simple window in any case.
          if (!becomesFocused &&
              (isGrabbing() || getOwnerFrameDialog(grabbingWindow) == this))
          {
+             if (focusLog.isLoggable(PlatformLogger.FINE)) {
                  focusLog.fine("ungrabbing on " + grabbingWindow);
+             }
              // ungrab a simple window if its owner looses activation.
              grabbingWindow.ungrab();
          }
  
          KeyboardFocusManagerPeer kfmPeer = LWKeyboardFocusManagerPeer.getInstance();