Jaws application freezing if you launching it through browser as a root on both (IA,Sparc) Solaris platform, Linux is Ok.
tested on SolarisSparc8 and SolarisIA8
j2re1.4.1(build13), jaws1.2 (build10)

Steps:
- login as a root
- install jre with javaws
- try to launch any demo application
- application freezing
you only can launch application from Application Manager

This is log file:
Java Web Start 1.2-beta Console, started Fri May 24 16:18:28 PDT 2002
Java 2 Runtime Environment: Version 1.4.1-beta by Sun Microsystems Inc.
Logging to file: /javawsDTF.log
java.security.AccessControlException: access denied (java.lang.RuntimePermission accessClassInPackage.com.sun.
javaws)
        at java.security.AccessControlContext.checkPermission(AccessControlContext.java:270)
        at java.security.AccessController.checkPermission(AccessController.java:401)
        at java.lang.SecurityManager.checkPermission(SecurityManager.java:542)
        at java.lang.SecurityManager.checkPackageAccess(SecurityManager.java:1513)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:262)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
        at com.sun.javaws.Launcher.continueLaunch(Launcher.java:573)
        at com.sun.javaws.Launcher.handleApplicationDesc(Launcher.java:352)
        at com.sun.javaws.Launcher.handleLaunchFile(Launcher.java:177)
        at com.sun.javaws.Launcher.run(Launcher.java:145)
        at java.lang.Thread.run(Thread.java:536)
java.lang.SecurityException: Unable to create temporary file
        at java.io.File.checkAndCreate(File.java:1310)
        at java.io.File.createTempFile(File.java:1401)
        at com.sun.javaws.SplashGenerator.create(SplashScreen.java:338)
        at com.sun.javaws.SplashGenerator$1.finishedLoadingImage(SplashScreen.java:224)
        at com.sun.javaws.cache.CacheImageLoader$1.run(CacheImageLoader.java:71)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:448)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
Java Web Start 1.2-beta Console, started Fri May 24 16:22:57 PDT 2002
Java 2 Runtime Environment: Version 1.4.1-beta by Sun Microsystems Inc.
Logging to file: /javawsDTF.log
java.security.AccessControlException: access denied (java.lang.RuntimePermission accessClassInPackage.com.sun.
javaws)
        at java.security.AccessControlContext.checkPermission(AccessControlContext.java:270)
        at java.security.AccessController.checkPermission(AccessController.java:401)
        at java.lang.SecurityManager.checkPermission(SecurityManager.java:542)
        at java.lang.SecurityManager.checkPackageAccess(SecurityManager.java:1513)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:262)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
        at com.sun.javaws.Launcher.continueLaunch(Launcher.java:573)
        at com.sun.javaws.Launcher.handleApplicationDesc(Launcher.java:352)
        at com.sun.javaws.Launcher.handleLaunchFile(Launcher.java:177)
        at com.sun.javaws.Launcher.run(Launcher.java:145)
        at java.lang.Thread.run(Thread.java:536)

Bug exist on all jaws1.2 builds from 5-10.
If necessary I will investigate deeper.