sun studio 11 installation failure.

 Installing Sun Studio Software  
 Exception in thread "Thread-27" java.lang.NoClassDefFoundError: com/sun/install/panels/ComponentSelectionListener  
     at java.lang.Class.getDeclaredMethods0(Native Method)  
     at java.lang.Class.privateGetDeclaredMethods(Class.java:2427)  
     at java.lang.Class.getDeclaredMethod(Class.java:1935)  
     at java.awt.Component.isCoalesceEventsOverriden(Component.java:5973)  
     at java.awt.Component.access$500(Component.java:169)  
     at java.awt.Component$3.run(Component.java:5927)  
     at java.awt.Component$3.run(Component.java:5925)  
     at java.security.AccessController.doPrivileged(Native Method)  
     at java.awt.Component.checkCoalescing(Component.java:5924)  
     at java.awt.Component.<init>(Component.java:5893)  
     at java.awt.Container.<init>(Container.java:251)  
     at javax.swing.JComponent.<init>(JComponent.java:570)  
     at javax.swing.JPanel.<init>(JPanel.java:65)  
     at javax.swing.JPanel.<init>(JPanel.java:92)  
     at javax.swing.JPanel.<init>(JPanel.java:100)  
     at com.sun.wizards.core.WizardComponent.<init>(WizardComponent.java:159)  
     at com.sun.wizards.core.WizardComponent.<init>(WizardComponent.java:145)  
     at com.sun.wizards.core.WizardLeaf.<init>(WizardLeaf.java:78)  
     at com.sun.install.panels.ComponentPanel.<init>(ComponentPanel.java:144)  
     at com.sun.install.products.CreateSimpleUninstaller.createSimpleUninstallerTree(CreateSimpleUninstaller.java:42)  
     at com.sun.install.products.UninstallArchiveCreator.writeArchiveFile(UninstallArchiveCreator.java:537)  
     at com.sun.install.products.UninstallArchiveCreator.writeArchive(UninstallArchiveCreator.java:317)  
     at com.sun.install.products.UninstallUnit.install(UninstallUnit.java:740)  
     at com.sun.install.products.Product.performInstallation(Product.java:649)  
     at com.sun.install.tasks.ProductTask.perform(ProductTask.java:153)  
     at com.sun.wizards.core.Sequence.perform(Sequence.java:343)  
     at com.sun.wizards.core.SequenceManager.run(SequenceManager.java:226)  
     at java.lang.Thread.run(Thread.java:662)  
 really?  
 # mv /usr/java /usr/java.orig  
 # ln -s /usr/jdk/jdk1.5.0_30 /usr/java  

yeah. so, jdk1.6 is a no go.