I downloaded the CPUOct2006 patch for 10.2.0.2 and applied it successfully to my database.
SQL> select action,id,comments from dba_registry_history; ACTION ID COMMENTS ------ ---------- ---------- CPU 5490848 CPUOct2006
in the logfile, apart from a few ignorable ORA-02303: cannot drop or replace a type with type or table dependents errors, everything went fine.
Applying the security patch shortly after they are released is in my opinion a good practice, because a fix could sometimes reverse-engineered to reveal the bug.
Tomorrow afternoon I flight via London to SF for OOW2006. I am quite unhappy about not taking my notebook, my phone, not even a book or a SuDoKu in the plane 🙁 Well, I hope BA will not refuse to serve me wine this time as Delta did last year