ps -o using AIX formatting is broken
The AIX formatters in 4.0.2 no longer work as they did in 3.3.17, making them essentially useless, and breaking existing scripting of ps.
While AIX formatting had worked like a printf, as described in the man page, it doesn't anymore. AIX format codes must now be space-separated, where before everything the entire arg to -o was taken literally with AIX formatters were used, as in a printf format string. The %a formatter now truncates, where previously it ran to the terminal edge or specify screen width when it was last item in the -o argument.