diff --git a/gestion/darcs_send_changes.py b/gestion/darcs_send_changes.py
index 3689a965..e7264f34 100644
--- a/gestion/darcs_send_changes.py
+++ b/gestion/darcs_send_changes.py
@@ -51,21 +51,24 @@ CONF_PATH = "_darcs/third-party/darcs-send-changes"
 DATE_FILE = CONF_PATH + "/date-last-send"
 ID_FILE = CONF_PATH + "/id"
 
-def to_utf8(str):
+def to_utf8(input):
     """ Decode un str ou un unicode vers un str en UTF-8. """
-    if isinstance(str, unicode):
-        return str.encode("UTF-8")
+    if not isinstance(input, basestring):
+        return input
+    
+    if isinstance(input, unicode):
+        return input.encode("UTF-8")
     else:
         try:
             # Si c'est une chaine brute, on commend par essayer
             # de la décoder comme une chaine en UTF-8
-            str.decode("UTF-8")
-            return str
-        except:
+            input.decode("UTF-8")
+            return input
+        except UnicodeDecodeError:
             try:
-                return str.decode(encoding).encode("UTF-8")
-            except:
-                return str
+                return input.decode("ISO-8859-15").encode("UTF-8")
+            except (UnicodeDecodeError, UnicodeEncodeError):
+                return input.decode("ascii", "replace").encode("UTF-8")
 
 def darcs(args):
     """ Invoque darcs et renvoie sa sortie. """