OFS.Traversable still used a string 'NotFound' exception.

doc/CHANGES.txt

@@ -63,6 +63,8 @@ Zope Changes
 
     Bugs fixed
 
+      - OFS.Traversable still used a string 'NotFound' exception.
+
       - ZPublisher would fail to recognize a XML-RPC request if the
         content-type header included a 'charset' parameter.
 

lib/python/OFS/Traversable.py

@@ -21,7 +21,7 @@ from AccessControl.ZopeGuards import guarded_getattr
 from ZODB.POSException import ConflictError
 from urllib import quote
 
-NotFound = 'NotFound'
+from zExceptions import NotFound
 
 _marker = object()