--- C:\apps\Python\trunk\Lib\json\decoder.py	2009-01-26 22:50:19.000000000 -0200
+++ C:\apps\Python\trunk\Lib\json\decoder.working.py	2009-01-26 22:47:48.000000000 -0200
@@ -168,7 +168,8 @@
     if nextchar == '}':
         return pairs, end + 1
     if nextchar != '"':
-        raise ValueError(errmsg("Expecting property name", s, end))
+        raise ValueError(errmsg(
+            "Expecting property name enclosed in double quotes", s, end))
     end += 1
     encoding = getattr(context, 'encoding', None)
     strict = getattr(context, 'strict', True)
@@ -177,7 +178,7 @@
         key, end = scanstring(s, end, encoding, strict)
         end = _w(s, end).end()
         if s[end:end + 1] != ':':
-            raise ValueError(errmsg("Expecting : delimiter", s, end))
+            raise ValueError(errmsg("Expecting ':' delimiter", s, end))
         end = _w(s, end + 1).end()
         try:
             value, end = iterscan(s, idx=end, context=context).next()
@@ -190,12 +191,13 @@
         if nextchar == '}':
             break
         if nextchar != ',':
-            raise ValueError(errmsg("Expecting , delimiter", s, end - 1))
+            raise ValueError(errmsg("Expecting ',' delimiter", s, end - 1))
         end = _w(s, end).end()
         nextchar = s[end:end + 1]
         end += 1
         if nextchar != '"':
-            raise ValueError(errmsg("Expecting property name", s, end - 1))
+            raise ValueError(errmsg(
+                "Expecting property name enclosed in double quotes", s, end - 1))
     object_hook = getattr(context, 'object_hook', None)
     if object_hook is not None:
         pairs = object_hook(pairs)
@@ -224,7 +226,7 @@
         if nextchar == ']':
             break
         if nextchar != ',':
-            raise ValueError(errmsg("Expecting , delimiter", s, end))
+            raise ValueError(errmsg("Expecting ',' delimiter", s, end))
         end = _w(s, end).end()
     return values, end
 pattern(r'\[')(JSONArray)