Notices when creating tables

[Luke <..hidden..>]

(1.3 installation)

Not being a PostGreSQL expert, should I be concerned at the rather huge 
number of these notices during installation?

NOTICE:  CREATE TABLE will create implicit sequence "entity_id_seq" for 
serial column "entity.id"
NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index 
"entity_pkey" for table "entity"
NOTICE:  CREATE TABLE / UNIQUE will create implicit index "entity_id_key" 
for table "entity"
...
NOTICE:  CREATE TABLE will create implicit sequence "users_id_seq" for 
serial column "users.id"
NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index 
"users_pkey" for
table "users"
NOTICE:  CREATE TABLE / UNIQUE will create implicit index "users_id_key" 
for table "users"