VISTA: accesscontrolexception in javaplugin when loading jar file from cache

FULL PRODUCT VERSION :
1.6.0-rc

ADDITIONAL OS VERSION INFORMATION :
Windows Vista 6.0

A DESCRIPTION OF THE PROBLEM :
the following exception is thrown when an applet tries to load a jar file

ava.security.AccessControlException: access denied (java.io.FilePermission C:\Users\root\AppData\LocalLow\Sun\Java\Deployment\cache\6.0\46\1eb256e-5c10fb0d read)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkRead(Unknown Source)
at java.util.zip.ZipFile.<init>(Unknown Source)
at java.util.jar.JarFile.<init>(Unknown Source)
at java.util.jar.JarFile.<init>(Unknown Source)
at com.sun.deploy.cache.CachedJarFile.<init>(Unknown Source)
at com.sun.deploy.cache.CachedJarFile.clone(Unknown Source)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFile(Unknown Source)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.getContent(Unknown Source)
at java.net.URL.getContent(Unknown Source)
...

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
no excpetion thrown
ACTUAL -
exception

ERROR MESSAGES/STACK TRACES THAT OCCUR :
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkRead(Unknown Source)
at java.util.zip.ZipFile.<init>(Unknown Source)
at java.util.jar.JarFile.<init>(Unknown Source)
at java.util.jar.JarFile.<init>(Unknown Source)
at com.sun.deploy.cache.CachedJarFile.<init>(Unknown Source)
at com.sun.deploy.cache.CachedJarFile.clone(Unknown Source)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFile(Unknown Source)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.getContent(Unknown Source)
at java.net.URL.getContent(Unknown Source)
...

REPRODUCIBILITY :
This bug can be reproduced always.