Time format ? (Really microsecond ??)

Hello, I'm trying to use microseconds in a field time:
siranau=> create table toto ( a time );
CREATE
siranau=> insert into toto values ('00:10:45.56');
INSERT 61641 1
siranau=> select * from toto;
a
--------
00:10:45
(1 row)

As you can see, I cannot get the microseconds value.

Something more problematic is the following:
% pg_dump -t toto siranau
\connect - siranau
CREATE TABLE toto (a time);
COPY toto FROM stdin;
00:10:45
\.

As you can see, microseconds values are lost !

Ph.R.

--
_____________________________________________________________________
Philippe Rochat, EPFL DI-LBD
Database Laboratory CH-1015 LAUSANNE
Swiss Federal Institute of Technology (EPFL) tel:++41 21 693 52 53
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mailto:Philippe(dot)Rochat(at)epfl(dot)ch, http://lbdwww.epfl.ch/~prochat