gistfile1.diff

index dff29ca..d80a0f7 100644
--- a/deluge/core/torrent.py
+++ b/deluge/core/torrent.py
@@ -70,9 +70,9 @@ def clean_filename(filename):
         newfilepath = clean_filename(filepath)
 
     if folder is True:
-        return newfilepath + '/'
+        return os.path.normpath(newfilepath) + os.path.sep
     else:
-        return newfilepath
+        return os.path.normpath(newfilepath)
 
 class TorrentOptions(dict):
     def __init__(self):