fixed bug in encode/decode, thanks Jonathan

VERSION

@@ -1 +1 @@
-Version 2.4.2-stable+timestamp.2013.03.10.11.04.02
+Version 2.4.2-stable+timestamp.2013.03.10.11.05.31

gluon/validators.py

@@ -191,7 +191,7 @@ class IS_MATCH(Validator):
 
     def __call__(self, value):
         if self.unicode and not isinstance(value,unicode):
-            match = self.regex.search(str(value).encode('utf8'))
+            match = self.regex.search(str(value).decode('utf8'))
         else:
             match = self.regex.search(str(value))
         if match is not None: