Empty bytea format - 9.1devel pg_dump and psql

Hi,

I'm not sure whether it is OK, a blank format for bytea, which is presented
in 9.1devel (pg_dump and psql)

Earlier versions (7, 8):
psql - signature bytea not null default '':: bytea
pg_dump - signature bytea default ''::bytea not null

postgresql.conf:
standard_conforming_strings = off
bytea_output = 'hex'

9.1devel:
psql - signature bytea not null default '\ x':: bytea
pg_dump - signature bytea default '\\x'::bytea not null

Best regards
Vladimir Kokovic, DP senior, Belgrade, Serbia