It means that driver not going to handle any unicode character set with that configuration. I am not sure how to fix the error yet. Are you using 64 bit driver of your PostgreSQL ODBC? Looks like you are using x64 Windows box.
Yes, as i said is a win7 professional x64. it works with ansi, though. i can live with that, if it is fine... just posted about the strange warning.
As you can see in the next thread, i am really newbie in teiid, and need to re-read all the docs carefully maybe...