with 6u12 b02 PIT build, invoke:

C:\Program Files\Java\jre6\lib>javaws -silent -import -reverse -javafx -J-Dkernel.download.dialog=false http://dl.javafx.com/javafx-cache.jnlp

we will fail with:

java.awt.HeadlessException
at java.awt.GraphicsEnvironment.checkHeadless(Unknown Source)
at java.awt.Window.<init>(Unknown Source)
at java.awt.Frame.<init>(Unknown Source)
at com.sun.deploy.ui.DialogTemplate.deriveParent(DialogTemplate.java:1585)
at com.sun.deploy.ui.DialogTemplate.<init>(DialogTemplate.java:105)
at com.sun.deploy.ui.ProgressDialog.<init>(ProgressDialog.java:37)
at com.sun.deploy.ui.UIFactory$10.execute(UIFactory.java:738)
at com.sun.javaws.ui.JavawsSysRun.delegate(JavawsSysRun.java:156)
at com.sun.deploy.util.DeploySysRun.execute(DeploySysRun.java:24)
at com.sun.deploy.ui.UIFactory.createProgressDialog(UIFactory.java:736)
at com.sun.javaws.ui.DownloadWindow.initialize(DownloadWindow.java:125)
at com.sun.javaws.ui.DownloadWindow.initialize(DownloadWindow.java:137)
at com.sun.javaws.ui.DownloadWindowHelper.get(DownloadWindowHelper.java:27)
at com.sun.javaws.Launcher.downloadResources(Launcher.java:1046)
at com.sun.javaws.Launcher.prepareLaunchFile(Launcher.java:629)
at com.sun.javaws.Launcher.prepareToLaunch(Launcher.java:207)
at com.sun.javaws.Launcher.launch(Launcher.java:101)
at com.sun.javaws.Main.launchApp(Main.java:311)
at com.sun.javaws.Main.continueInSecureThread(Main.java:215)
at com.sun.javaws.Main$1.run(Main.java:103)
at java.lang.Thread.run(Unknown Source)
#### Java Web Start Error:
#### null
java.awt.HeadlessException
at java.awt.GraphicsEnvironment.checkHeadless(Unknown Source)
at java.awt.Window.<init>(Unknown Source)
at java.awt.Frame.<init>(Unknown Source)
at com.sun.deploy.ui.DialogTemplate.deriveParent(DialogTemplate.java:1585)
at com.sun.deploy.ui.DialogTemplate.<init>(DialogTemplate.java:105)
at com.sun.deploy.ui.UIFactory$3.execute(UIFactory.java:235)
at com.sun.javaws.ui.JavawsSysRun.delegate(JavawsSysRun.java:156)
at com.sun.deploy.util.DeploySysRun.execute(DeploySysRun.java:24)
at com.sun.deploy.util.DeploySysRun$1.run(DeploySysRun.java:46)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.deploy.util.DeploySysRun.executePrivileged(DeploySysRun.java:42)
at com.sun.deploy.ui.UIFactory.showErrorDialog(UIFactory.java:231)
at com.sun.javaws.ui.LaunchErrorDialog$2.execute(LaunchErrorDialog.java:237)
at com.sun.javaws.ui.JavawsSysRun.delegate(JavawsSysRun.java:156)
at com.sun.deploy.util.DeploySysRun.execute(DeploySysRun.java:24)
at com.sun.deploy.util.DeploySysRun.execute(DeploySysRun.java:33)
at com.sun.javaws.ui.LaunchErrorDialog.show(LaunchErrorDialog.java:253)
at com.sun.javaws.Launcher.prepareToLaunch(Launcher.java:214)
at com.sun.javaws.Launcher.launch(Launcher.java:101)
at com.sun.javaws.Main.launchApp(Main.java:311)
at com.sun.javaws.Main.continueInSecureThread(Main.java:215)
at com.sun.javaws.Main$1.run(Main.java:103)
at java.lang.Thread.run(Unknown Source)