DROPping tables with SERIALs

Hi,

I have run into a problem dropping and re-creating tables with
type SERIAL:

CREATE TABLE t ( s SERIAL);
DROP TABLE t;
CREATE TABLE t ( s SERIAL);

gives
ERROR:  t_s_seq relation already exists

This looks like the implicitly created sequence t_s_seq is not dropped
together with the table.

I am running a current (?) cvs snapshot from anoncvs@postgresql.org.

Jan