org.postgresql.util.PSQLException: ERROR: 2 rows updated, deleted, or inserted. Expected one and only one row.

Steps to reproduce:

CREATE TABLE test (x INT, y INT);

on master:

CREATE TRIGGER test_sn AFTER INSERT OR DELETE OR UPDATE ON test FOR EACH STATEMENT EXECUTE PROCEDURE bruce.logsnapshottrigger();
CREATE TRIGGER test_tx AFTER INSERT OR DELETE OR UPDATE ON test FOR EACH ROW EXECUTE PROCEDURE bruce.logtransactiontrigger();

on slave:

CREATE TRIGGER test_deny BEFORE INSERT OR DELETE OR UPDATE ON test FOR EACH ROW EXECUTE PROCEDURE bruce.denyaccesstrigger();

on master:

INSERT INTO test VALUES (1, 1);
INSERT INTO test VALUES (1, 1);
DELETE FROM test WHERE x=1 AND y=1;

=# select * from bruce.slavesnapshotstatus ;
clusterid | slave_xaction | master_current_xaction | master_min_xaction | master_max_xaction | master_outstanding_xactions | update_time
---------------------------------------------------------------------------------------------------------------------------------------
1 | 9950079 | 358712580 | 358712580 | 358712581 | 358712580 | 2007-09-25 11:30:30.813368
(1 row)

=> select * from bruce.transactionlog where xaction=358712580;
rowid | xaction | cmdtype | tabname | info
-------------------------------------------------------------
48869 | 358712580 | D | public.test | x:int4:MQ==:Unable to render embedded object: File () not found.
48870 | 358712580 | D | public.test | x:int4:MQ==:Unable to render embedded object: File () not found.
(2 rows)