Run the installer on Beta 3 candidate - jbdevstudio-product-universal-5.0.0.v201204301418M-H119-Beta3.jar
under Windows 7 with Java 7 64-bit JVM results in the follow error - and blank screen during the JVM selection.

C:\gettingstarted2>java jar jbdevstudio-product-universal-5.0.0.v201204301418M
H119-Beta3.jar
java.lang.NullPointerException
at com.jboss.jbds.installer.P2DirectorStarterListener.findPathJar(P2Dire
ctorStarterListener.java:66)
at com.jboss.jbds.installer.JREPathPanel.getJavaPlatformProperties(JREPa
thPanel.java:283)
at com.jboss.jbds.installer.JREPathPanel.verifyVersion(JREPathPanel.java
:274)
at com.jboss.jbds.installer.JREPathPanel.panelActivate(JREPathPanel.java
:229)
at com.izforge.izpack.installer.InstallerFrame.switchPanel(InstallerFram
e.java:839)
at com.izforge.izpack.installer.InstallerFrame.navigateNext(InstallerFra
me.java:1450)
at com.izforge.izpack.installer.InstallerFrame.navigateNext(InstallerFra
me.java:1418)
at com.izforge.izpack.installer.InstallerFrame$NavigationHandler.actionP
erformed(InstallerFrame.java:1560)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Sour
ce)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Sour
ce)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Sour
ce)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Sour
ce)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at com.jboss.jbds.installer.P2DirectorStarterListener.findPathJar(P2Dire
ctorStarterListener.java:66)
at com.jboss.jbds.installer.JREPathPanel.getJavaPlatformProperties(JREPa
thPanel.java:283)
at com.jboss.jbds.installer.JREPathPanel.verifyVersion(JREPathPanel.java
:274)
at com.jboss.jbds.installer.JREPathPanel.isValidated(JREPathPanel.java:1
95)
at com.izforge.izpack.installer.IzPanel.panelValidated(Unknown Source)
at com.izforge.izpack.installer.InstallerFrame.navigateNext(InstallerFra
me.java:1433)
at com.izforge.izpack.installer.InstallerFrame.navigateNext(InstallerFra
me.java:1418)
at com.izforge.izpack.installer.InstallerFrame$NavigationHandler.actionP
erformed(InstallerFrame.java:1560)