"analyze" putting wrong reltuples in pg_class

On a number of my tables, "analyze" seems to be putting the wrong value of
"reltuples" in pg_class.  "vacuum" seems to be doing the right thing.

An example of the failure mode is shown below.  Please let me know what
additional info I could supply if more info would help.

  Ron



logs2=# select count(*) from e_ip_full;
  count
---------
 1697755
(1 row)

logs2=# analyze e_ip_full;

logs2=# select relname,reltuples from pg_class where relname = 'e_ip_full';
  relname  | reltuples
-----------+-----------
 e_ip_full |      7555
(1 row)

logs2=# vacuum e_ip_full;
VACUUM
logs2=# select relname,reltuples from pg_class where relname = 'e_ip_full';
  relname  |  reltuples
-----------+-------------
 e_ip_full | 1.69776e+06
(1 row)

logs2=# analyze verbose e_ip_full;
NOTICE:  Analyzing e_ip_full
ANALYZE
logs2=# select relname,reltuples from pg_class where relname = 'e_ip_full';
  relname  | reltuples
-----------+-----------
 e_ip_full |      7555
(1 row)


logs2=# \d e_ip_full;
               Table "e_ip_full"
  Column  |          Type           | Modifiers
----------+-------------------------+-----------
 ip       | character varying(16)   |
 dat      | date                    |
 dom1     | character varying(255)  |
 dom2     | character varying(255)  |
 dom3     | character varying(255)  |
 dom4     | character varying(255)  |
 domn     | character varying(1024) |
 obsolete | boolean                 |
Indexes: e_ip__domain
Unique keys: e_ip__ip_obsolete_dat

logs2=#