strange characters

I try the example in the manual:

SQL = "INSERT INTO authors (name) VALUES (%s);"

data = ("O'Reilly", )

cur.mogrify(SQL,data)

"INSERT INTO authors (name) VALUES (E'O''Reilly');"

strange characters:

àE’ß

The same in

>>> cur.mogrify("select * from xxx where coll='%(coll)s'",{'coll':'1'});

"select * from xxx where coll='E'1''"

Instead with number work fine:

>>> cur.mogrify("select * from xxx where coll='%(coll)s'",{'coll':1});

"select * from xxx where coll='1'"

Environment:

Server: PostgreSQL 9.0.1 on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-48), 64-bit         

psycopg2-2.3.1

Villiam