Like seems to fail !

Hello,
   I have a strange problem with 'like' behaviour    when I upgrade from 6.5 to 7.0
   Here is my table :

create table persistent_config (   key     varchar primary key,   type    varchar(12),   value   varchar not null
)
   and its content :

base=# select * from persistent_config;   key     | type |    value     
------------+------+--------------/test/info |      | avalue/try/info  |      | avalue/test/key  |      | changedvalue
(3 rows)
   And I try this 'like' command in psql :

base=# select * from persistent_config where key like '/test%';   key     | type |    value     
------------+------+--------------/test/info |      | avalue/test/key  |      | changedvalue
(2 rows)
        Result is ok !
  By now, this other one :

base=# select * from persistent_config where key like '/%';key | type | value 
-----+------+-------
(0 rows)
    There is really something wrong !  All current content should have been    returned. Is '/' caracter a new 'escape'
caractersince version 6.5    In fact, my query was working well on postgresql 6.5 and since I upgraded    to 7.0, this
simplecommand failed.    Is it a bug, or I missed something ?
 
 Regards,

-- 
Yves Martin
yma, Lausanne