diff --git a/src/calibre/library/cli.py b/src/calibre/library/cli.py
index f76fb5bba7..bce926ad35 100644
--- a/src/calibre/library/cli.py
+++ b/src/calibre/library/cli.py
@@ -100,14 +100,14 @@ List the books available in the calibre database.
     if not set(fields).issubset(FIELDS):
         parser.print_help()
         print
-        print _('Invalid fields. Available fields:'), ','.join(FIELDS)
+        print >>sys.stderr, _('Invalid fields. Available fields:'), ','.join(FIELDS)
         return 1
     
     db = get_db(dbpath, opts)
     if not opts.sort_by in FIELDS:
         parser.print_help()
         print
-        print _('Invalid sort field. Available fields:'), ','.join(FIELDS)
+        print >>sys.stderr, _('Invalid sort field. Available fields:'), ','.join(FIELDS)
         return 1
     
     do_list(db, fields, opts.sort_by, opts.ascending, opts.search)
@@ -121,6 +121,7 @@ class DevNull(object):
 NULL = DevNull()
 
 def do_add(db, paths, one_book_per_directory, recurse, add_duplicates):
+    orig = sys.stdout
     sys.stdout = NULL
     try:
         files, dirs = [], []
@@ -169,26 +170,26 @@ def do_add(db, paths, one_book_per_directory, recurse, add_duplicates):
             for mi, formats in dir_dups:
                 db.import_book(mi, formats)
         else:
-            print _('The following books were not added as they already exist in the database (see --duplicates option):')
+            print >>sys.stderr, _('The following books were not added as they already exist in the database (see --duplicates option):')
             for mi, formats in dir_dups:
                 title = mi.title
                 if isinstance(title, unicode):
                     title = title.encode(preferred_encoding)
-                print '\t', title + ':'
+                print >>sys.stderr, '\t', title + ':'
                 for path in formats:
-                    print '\t\t ', path
+                    print >>sys.stderr, '\t\t ', path
             if file_duplicates:
                 for path, mi in zip(file_duplicates[0], file_duplicates[2]):
                     title = mi.title
                     if isinstance(title, unicode):
                         title = title.encode(preferred_encoding)
-                    print '\t', title+':'
-                    print '\t\t ', path
+                    print >>sys.stderr, '\t', title+':'
+                    print >>sys.stderr, '\t\t ', path
         
         if send_message is not None:
             send_message('refreshdb:', 'calibre GUI')
     finally:
-        sys.stdout = sys.__stdout__
+        sys.stdout = orig
             
             
     
@@ -211,7 +212,7 @@ the directory related options below.
     if len(args) < 2:
         parser.print_help()
         print
-        print _('You must specify at least one file to add')
+        print >>sys.stderr, _('You must specify at least one file to add')
         return 1
     do_add(get_db(dbpath, opts), args[1:], opts.one_book_per_directory, opts.recurse, opts.duplicates)
     return 0
@@ -241,7 +242,7 @@ list of id numbers (you can get id numbers by using the list command). For examp
     if len(args) < 2:
         parser.print_help()
         print
-        print _('You must specify at least one book to remove')
+        print >>sys.stderr, _('You must specify at least one book to remove')
         return 1
     
     ids = []
@@ -272,7 +273,7 @@ by id. You can get id by using the list command. If the format already exists, i
     if len(args) < 3:
         parser.print_help()
         print
-        print _('You must specify an id and an ebook file')
+        print >>sys.stderr, _('You must specify an id and an ebook file')
         return 1
     
     id, file, fmt = int(args[1]), open(args[2], 'rb'), os.path.splitext(args[2])[-1]
@@ -298,7 +299,7 @@ do nothing.
     if len(args) < 3:
         parser.print_help()
         print
-        print _('You must specify an id and a format')
+        print >>sys.stderr, _('You must specify an id and a format')
         return 1
     
     id, fmt = int(args[1]), args[2].upper()
@@ -329,7 +330,7 @@ id is an id number from the list command.
     if len(args) < 2:
         parser.print_help()
         print 
-        print _('You must specify an id')
+        print >>sys.stderr, _('You must specify an id')
         return 1
     id = int(args[1])
     do_show_metadata(get_db(dbpath, opts), id, opts.as_opf)
@@ -356,7 +357,7 @@ show_metadata command.
     if len(args) < 3:
         parser.print_help()
         print 
-        print _('You must specify an id and a metadata file')
+        print >>sys.stderr, _('You must specify an id and a metadata file')
         return 1
     id, opf = int(args[1]), open(args[2], 'rb')
     do_set_metadata(get_db(dbpath, opts), id, opf)