Web start for Java 7 (update 8) on MacOS Lion can't create shortcut

We have a Webstart working fine on Java 6, lately one of our user updated to Java 7, and the shortcut of this Web Start can not be successfully installed. with this exception:
     Match: Running JREInfo Version match: 1.7.0.08.ea == 1.7.0.08.ea
     Match: Running JVM args match: have:<-Xmx256m -Xms128m> satisfy want:<-Xmx256m -Xms128m>
java.io.FileNotFoundException: /Users/ryantan/Library/Application Support/Oracle/Java/Deployment/cache/6.0/4/61fa8384-5f843c43.icns (No such file or directory)
     at java.io.FileInputStream.open(Native Method)
     at java.io.FileInputStream.<init>(FileInputStream.java:138)
     at java.io.FileInputStream.<init>(FileInputStream.java:97)
     at com.sun.javaws.MacOSXShortcutUtil.copy(Unknown Source)
     at com.sun.javaws.MacOSXShortcutUtil.createBundle(Unknown Source)
     at com.sun.javaws.MacOSXLocalInstallHandler.createBundle(Unknown Source)
     at com.sun.javaws.MacOSXLocalInstallHandler.createShortcuts(Unknown Source)
     at com.sun.javaws.LocalInstallHandler.installShortcuts(Unknown Source)
     at com.sun.javaws.LocalInstallHandler.performIntegration(Unknown Source)
     at com.sun.javaws.LocalInstallHandler.install(Unknown Source)
     at com.sun.javaws.Launcher.notifyLocalInstallHandler(Unknown Source)
     at com.sun.javaws.Launcher.prepareResources(Unknown Source)
     at com.sun.javaws.Launcher.prepareAllResources(Unknown Source)
     at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
     at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
     at com.sun.javaws.Launcher.launch(Unknown Source)
     at com.sun.javaws.Main.launchApp(Unknown Source)
     at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
     at com.sun.javaws.Main.access$000(Unknown Source)
     at com.sun.javaws.Main$1.run(Unknown Source)
     at java.lang.Thread.run(Thread.java:722)
=========================
in the JNLP file we have these lines declare a shortcut on desktop, and it works exactly for Java 6 on same machine:
<shortcut online="true">
<desktop/>
<menu submenu="XXXXX">
</shortcut>
so I was wondering if any one have encountered same issue like this? please give me some hint about how to work around with this, Thanks in advance.
Ryan Tan

Ryan
Which icon do you use? If it's a .png icon, then it's a known bug (id - 7189893) and this bug will be fixed soon.
As a workaround, you can export the icon to different format (supported formats - gif jpeg jpg icns) to see if it helps.
Dmitry

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