timestamp format bug

["Roberts, Jon" <Jon(dot)Roberts(at)asurion(dot)com>]

select to_char(date, 'yyyy-mm-dd hh24:mi:ss.ms') as char, 
       date 
  from (select timestamp'2008-01-30 15:06:21.560' as date) sub


"2008-01-30 15:06:21.560";"2008-01-30 15:06:21.56"

Why does the timestamp field truncate the 0 but when I show the
timestamp as a character in the default timestamp format, it does not
truncate the trailing zero?  

These two fields should be consistent because they should be formatted
the same way.  I'm using versions 8.2.4 and 8.2.5 and both versions gave
me the same results.


Jon