ОС: CentOS 5.
сначала пробовал инсталлировать из под не админа в домашний каталог
имеем следующий вывод:

java version "1.6.0_10"
Java(TM) SE Runtime Environment (build 1.6.0_10-b33)
Java HotSpot(TM) Client VM (build 11.0-b15, mixed mode, sharing)
License verify:
Type: Server, sign and encrypt
Allowed amount of cores: 4
Validity: Until Mar 13, 2011
Valid license.
Start list known packages:
Loading package ru.CryptoPro.JCPRequest.RequestInstall
Loading package ru.CryptoPro.JCP.Install.JCPInstaller
Loading package ru.CryptoPro.Install.SelfInstaller
Loading package ru.CryptoPro.reprov.Install
Loading package ru.CryptoPro.JCP.KeyStore.Oscar.Installer
Loading package ru.CryptoPro.JCP.KeyStore.OCF.Install
Loading package ru.CryptoPro.JCPxml.XMLInstall
Loading package ru.CryptoPro.JCP.Install.JCPAsnInstaller
Known packages list:
JCPRequest
OCF
JCPxml
JCPRevCheck
Installer
JCP
Oscar
JCPAsn

Start list installed packages:
Loading package ru.CryptoPro.Install.SelfInstaller
Installed packages list:
Installer

Action packages list:
Installer

Executing commands:
Package Installer uninstalled succesfully.
Installed packages list was cleaned.
Tests list was cleaned.
Setting in java.security was cleaned.
Uninstall successful.
Following files were not deleted:
/home/adapter/java/jdk1.6.0_10/jre/lib/ext/JCPinst.jar
Start list known packages:
Loading package ru.CryptoPro.JCPRequest.RequestInstall
Package not found.
Loading package ru.CryptoPro.JCP.Install.JCPInstaller
ru.CryptoPro.Install.InstallError: ru.CryptoPro.Install.InstallError: Package not found.
at ru.CryptoPro.Install.AbstractInstaller.a(Unknown Source)
at ru.CryptoPro.Install.AbstractInstaller.a(Unknown Source)
at ru.CryptoPro.Install.ShellInstaller.h(Unknown Source)
at ru.CryptoPro.Install.ShellInstaller.makeAction(Unknown Source)
at ru.CryptoPro.Install.ShellInstaller.makeActionNoEx(Unknown Source)
at ru.CryptoPro.Install.VariantTwo.main(Unknown Source)
Caused by: ru.CryptoPro.Install.InstallError: Package not found.
at ru.CryptoPro.Install.AbstractInstaller.a(Unknown Source)
... 6 more
Caused by: java.lang.NoClassDefFoundError: ru/CryptoPro/Install/PackageInterface
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at sun.misc.Launcher$ExtClassLoader.findClass(Launcher.java:229)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at java.lang.ClassLoader.loadClass(ClassLoader.java:300)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:300)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
... 7 more
Caused by: java.lang.ClassNotFoundException: ru.CryptoPro.Install.PackageInterface
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at sun.misc.Launcher$ExtClassLoader.findClass(Launcher.java:229)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
... 24 more

из под рута тоже самое.
в чем засада?

Following files were not deleted: /home/adapter/java/jdk1.6.0_10/jre/lib/ext/JCPinst.jar
Такая проблема может появляться, например, если Вы ставите в запущеную Java.
Удалите пакеты JCP из lib/ext.

Другая это какая?

несовсем понятно, как это случилось, если на яву 1.6.0.23 мы ставили изначально и только потом из за этой ошибки ставили ставить на 1.6.0.10.

Тогда вообще не понятно, почему сначала на 23 апдейте не заработало, а на 10-ом заработало.