Recent RI changes have broken something

Does anyone know what is happening here? There is no other user; the
CREATE TABLE is part of a much larger script that was working OK last
Thursday. The script drops and recreates an entire database.

bray=# \d country
Table "country"
Attribute | Type | Modifier
-----------+---------+----------
id | char(2) | not null
name | text | not null
region | text |
telcode | text |
Index: country_pkey
Constraint: (id ~ '[A-Z]{2}'::text)

bray=# create table country_ccy
(
country char(2) references country (id) match full,
ccy char(3) references currency (symbol) match full,
primary key (country, ccy)
)
;
NOTICE: CREATE TABLE/PRIMARY KEY will create implicit index
'country_ccy_pkey'
for table 'country_ccy'
NOTICE: CREATE TABLE will create implicit trigger(s) for FOREIGN KEY check(s)
ERROR: RelationClearRelation: relation 21645 modified while in use

bray=# select relname from pg_class where oid = 21645;
relname
---------
country
(1 row)

country was referenced in a previous table's foreign key. In view of
the notes on RelationClearRelation, I am wondering if refcount wasn't
decremented after that table was created.

--
Oliver Elphick Oliver(dot)Elphick(at)lfix(dot)co(dot)uk
Isle of Wight http://www.lfix.co.uk/oliver
PGP key from public servers; key ID 32B8FAA1
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