[fw-mvc] Table query error: the pk exists but query errors...

I was wondering if any of you have encountered an error similar to the
one I have been experiencing. I am using ZF-1.11.1 and the pdo_pgsql
driver to connect to a postgresql-9.0.1 database.
The error:

"Primary key column(s) (author_id) are not columns in this table ()"

I have checked to make sure that I am on the right database. The table
is the 'authors' table and looks like this:

CREATE TABLE authors (
author_id integer NOT NULL,
display_name text NOT NULL,
name text NOT NULL
);

CREATE SEQUENCE authors_author_id_seq
START WITH 1
INCREMENT BY 1
NO MINVALUE
NO MAXVALUE
CACHE 1;

ALTER TABLE ONLY authors
ADD CONSTRAINT authors_pkey PRIMARY KEY (author_id);

The permissions have been setup correctly. I don't understand why the
$this->_table->fetchAll(); errors out on this. I can manually run the
SQL from the command line against the table successfully:

'select authors.* from public.authors;'

And no problems, lists all 4 tuples from the table. Is there something
wrong with the way I am trying to run the "fetchAll" method? I have
this same problem on a categories table as well. Very confounding.

--regards,
nathan