create OR REPLACE rule bug

I believe this is a bug:

-- OR REPLACE present
create or replace rule "mastertab_jan05_update" as
on update to mastertab where
(NEW.datecol < '20050101' or NEW.datecol >= '20050201')
and
(OLD.datecol >= '20050101' and OLD.datecol < '20050201')
do instead (
-- multiple commands
delete from mastertab_jan05 where id = OLD.id;
insert into mastertab (id, datecol) values (OLD.id, NEW.datecol);
);

=> ERROR: syntax error at end of input at character 255

-- OR REPLACE not present
create rule "mastertab_jan05_update" as
on update to mastertab where
(NEW.datecol < '20050101' or NEW.datecol >= '20050201')
and
(OLD.datecol >= '20050101' and OLD.datecol < '20050201')
do instead (
-- multiple commands
delete from mastertab_jan05 where id = OLD.id;
insert into mastertab (id, datecol) values (OLD.id, NEW.datecol);
);

=> Query OK, 0 rows affected (0,00 sec)

-- OR REPLACE present
create or replace rule "mastertab_jan05_update" as
on update to mastertab where
(NEW.datecol < '20050101' or NEW.datecol >= '20050201')
and
(OLD.datecol >= '20050101' and OLD.datecol < '20050201')
do instead (
-- single command, no semicolon
delete from mastertab_jan05 where id = OLD.id
);

=> Query OK, 0 rows affected (0,00 sec)

-- OR REPLACE present
create or replace rule "mastertab_jan05_update" as
on update to mastertab where
(NEW.datecol < '20050101' or NEW.datecol >= '20050201')
and
(OLD.datecol >= '20050101' and OLD.datecol < '20050201')
do instead (
-- single command, semicolon present
delete from mastertab_jan05 where id = OLD.id;
);

=> ERROR: syntax error at end of input at character 255

Ie, the "OR REPLACE" token is broken in that is doesn't work with multiple commands (semicolons?)

/Mikael