Strange Type Mismatch on Insert

Can anyone see what is the problem with the following insert?

gmp=# insert into data (site, gmp_id, item, category, gmp) values
('Rochester', 22, 'Design fee', 12, 40000.00);
ERROR: Unable to identify an operator '=' for types 'text' and 'int4'
You will have to retype this query using an explicit cast
gmp=# \d data
Table "data"
Attribute | Type | Modifier
-----------+---------------+------------------------
site | text | not null
gmp_id | integer | not null default 9999
co_id | text | not null default 'N/A'
item | text | not null
category | integer |
gmp | numeric(12,2) | default 0
co_status | char(1) |
Index: data_pkey

jeffe(at)kiyoko=> psql -V
psql (PostgreSQL) 7.0.0
jeffe(at)kiyoko=> uname -a
FreeBSD kiyoko.la.verio.net 4.0-STABLE FreeBSD 4.0-STABLE #0: Thu Apr 27
10:44:07 CDT 2000