Gilbert, are you saying you are running OpenACS on PG 7.1.1? If so, this has been mentioned several times here but I'll do it one more time anyways: PG 7.1.1 has a bug on PL/pgSQL that can cause part of your OpenACS pages to not function properly.
I'd recommend you go back to 7.1 or wait for 7.1.2, which will have the bug fixed.