Index: Cookie.py
===================================================================
--- Cookie.py	(revision 41632)
+++ Cookie.py	(working copy)
@@ -624,6 +624,7 @@
         i = 0            # Our starting point
         n = len(str)     # Length of string
         M = None         # current morsel
+        keys = {}        # Keys found in string
 
         while 0 <= i < n:
             # Start looking for a cookie
@@ -633,6 +634,13 @@
             K,V = match.group("key"), match.group("val")
             i = match.end(0)
 
+            # If a key is duplicated in the string, 
+            # only use the first value and ignore duplicates
+            if K in keys:
+                continue
+            else:
+                keys[K] = True
+
             # Parse the key, value in case it's metainfo
             if K[0] == "$":
                 # We ignore attributes which pertain to the cookie