utf8 COPY DELIMITER?

The \COPY command rejects multibyte delimiters.  Is this intentional 
behavior?

Here is an example of the behavior:

pgsql@compaq ~ $ touch foo
pgsql@compaq ~ $ psql -p 5555
Welcome to psql 8.3devel, the PostgreSQL interactive terminal.

Type:  \copyright for distribution terms       \h for help with SQL commands       \? for help with psql commands
\gor terminate with semicolon to execute query       \q to quit
 

pgsql=# create table foo (a integer);
CREATE TABLE
pgsql=# \copy foo from foo delimiter '標'
ERROR:  COPY delimiter must be a single character
\copy: ERROR:  COPY delimiter must be a single character



If your email/news reader doesn't render that properly, I'm using a 
pictogram character for the delimiter.

I checked out a new copy of the sources from cvs this morning.  It 
behaves the same way on 8.2.3.

mark