When trying to download a signed Java resource with a '.ear' extension, Java Web Start fails with a JNLPException:

JNLPException[category: Security Error : Exception: null : LaunchDesc:
...
  at com.sun.javaws.LaunchDownload.checkSignedResourcesHelper(LaunchDownload.java:1229)
  at com.sun.javaws.LaunchDownload.checkSignedResources(LaunchDownload.java:1075)
  at com.sun.javaws.Launcher.prepareLaunchFile(Launcher.java:620)
  at com.sun.javaws.Launcher.prepareToLaunch(Launcher.java:165)
  at com.sun.javaws.Launcher.launch(Launcher.java:95)
  at com.sun.javaws.Main.launchApp(Main.java:299)
  at com.sun.javaws.Main.continueInSecureThread(Main.java:209)
  at com.sun.javaws.Main$1.run(Main.java:106)
  at java.lang.Thread.run(Thread.java:619)

The resource is downloaded without a problem if it is renamed so that the extension is '.jar' (and the .jnlp file changed accordingly).

Also, the unchanged .ear file downloads fine with 1.6.0-b72, so something has changed since then.

Testcase has been uploaded to sunsolve 'cores' ftp site as ibm-20061124.zip

  To reproduce:

1. Extract files from archive.
2. Change launch.jnlp to point to the app.ear file on your machine.
3. Run "javaws launch.jnlp".