Bug in LIKE operator processing

I've found that statement:

SELECT * FROM os WHERE 'FreeBSD 4.7-RC'
LIKE string_id; (one of string_id's is 'FreeBSD 4.7%')

doesn't work. No error is reported. It does work in Oracle,
so I think it's a standard SQL query.

Table is defined as:

host=> \d os
Table "os"
Column | Type | Modifiers
-----------+-----------------------+-----------------------------------------------
id | integer | not null default nextval('"os_id_seq"'::text)
name | character varying(32) |
major | integer |
minor | integer |
subrev | character(16) |
string_id | character(32) |
Unique keys: os_id_key

PostgreSQL version is 7.3.1

Is it non-implemented by design, or maybe I've overlooked something?

Thanks, /S