Client encoding not the same as the db encoding

[Clodoaldo Neto <clodoaldo.pinto.neto@xxxxxxxxx>]

In 9.1.3 the client encoding is not defaulting to the db encoding:

postgresql.conf:

#client_encoding = sql_ascii 

=> show server_encoding;
 server_encoding 
-----------------
 SQL_ASCII

=> show client_encoding;
 client_encoding 
-----------------
 UTF8

In 9.0 the client encoding defaults to the db encoding:

postgresql.conf:

#client_encoding = sql_ascii

=> show client_encoding;
 client_encoding 
-----------------
 SQL_ASCII

=> show server_encoding;
 server_encoding 
-----------------
 SQL_ASCII

What am i missing? Regards, Clodoaldo