BUG #2913: Subscript on multidimensional array yields no value

The following bug has been logged online:

Bug reference: 2913
Logged by: Roman Nowak
Email address: roman_nowak(at)poczta(dot)onet(dot)pl
PostgreSQL version: 8.2.1
Operating system: Windows XP
Description: Subscript on multidimensional array yields no value
Details:

SELECT (ARRAY[[1,2],[3,4]])[1];

does not return [1,2]
(testes in psql and pgAdmin III): show info that one row was returned but
does not display its value

following statment works OK btw
SELECT (ARRAY[[1,2],[3,4]])[1:1];