finally got back to this project, in fact it was the issue with the JRE and LD_ASSUME_KERNEL=2.2.5 again. It did full me at first though, as I was entering it manually before starting OpenACS install and it did not work.
It only started working smoothly when I entered: export LD_ASSUME_KERNEL=2.2.5 in .bash_profile for users oracle and nsadmin and restarted the system.Im sure only one was needed but I just did not want to pick the wrong one first.
ciao.
janus