Index: config.py
==================================================================
--- config.py
+++ config.py
@@ -146,11 +146,12 @@
                 if os.path.exists(file):
                     os.unlink(file)
             else:
                 f = open(file, "w")
             # encode
-            json.dump(data, f, indent=(4 if nice else None))
+            data = json.dumps(data, indent=(4 if nice else None))
+            f.write(data.encode("utf-8"))
             f.close()
 
 
         # retrieve data from config file            
         def load(self, name):