problem with GRANT postgres 8.0.4

There are two tables

article_reviewers
   Column    |  Type   | Modifiers
-------------+---------+-----------
 article_id  | integer | not null
 reviewer_id | integer | not null
Foreign-key constraints:
    "$1" FOREIGN KEY (reviewer_id) REFERENCES reviewers(person_id)

reviewers
  Column   |  Type   | Modifiers
-----------+---------+-----------
 person_id | integer | not null
 status    | text    |
 keywords  | text    |
Indexes:
    "reviewers_pkey" PRIMARY KEY, btree (person_id)
Foreign-key constraints:
    "$1" FOREIGN KEY (person_id) REFERENCES persons(id)


When I try to execute sql statement:

INSERT   INTO article_reviewers (article_id, reviewer_id) VALUES (876,569);

ERROR:  permission denied for relation reviewers
KONTEKST:  SQL statement "SELECT 1 FROM ONLY "public"."reviewers" x
WHERE "person_id" = $1 FOR UPDATE OF x"

In person table there is ofcourse person with id=569.
User is super user and I did GRANT ALL on ALL TABLES :
public | article_reviewers        | table    |
{control=r/control,balcer=arwdRxt/control}
 public | articles                 | table    |
{control=r/control,balcer=arwdRxt/control}
public | persons        | table    |
{control=r/control,balcer=arwdRxt/control}

What is wrong, sorry if this is stupid question.
Jacek