Not able to login to APPS after upgrading to ATG RUP 4

Not able to login to APPS after upgrading to ATG RUP 4 (patch 4676589)

After applying patch 4676589 to upgrade to ATG RUP 4 users were no longer able to login to APPS and the following error occurred

Java.lang.NullPointerException
at oracle.apps.fnd.framework.webui.OADialogManager.getDialogMessages(OADialogManager.java:187)
at
oracle.apps.fnd.framework.webui.OAPageSecurity.displayPageSecurityError(OAPageSecurity.java:1223)
at oracle.apps.fnd.framework.webui.OAPageSecurity.validatePageSecurity(OAPageSecurity.java:938)
at oracle.apps.fnd.framework.webui.OAPageBean.processRequest(OAPageBean.java:2132)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1717)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:502)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:423)
at _oa__html._OA._jspService(_OA.java:86)

The cause of the problem that the ATG RUP4 had an incorrect class loader value in the file b3664848.ldt. based on (note 387061.1).

The solution is to do the following:
- Stop the Apps tire (adstpall.sh).
- Run the following command (on one line)
FNDLOAD apps/$appspass 0 Y UPLOAD $JTF_TOP/patch/115/import/jtfprefabcache.lct $FND_TOP/patch/115/import/US/b3664848.ldt CUSTOM_MODE=FORCE
- Start the Apps tire (adstrtal.sh).
- If the problem persisted bounce Apache and clear Apache cache

i hope no one will face any error in thire produciton env ;-)

and finaly
Oracle might be a magic when it comes to applying a big patch ;-)