+What's New in Python 2.1 (final)?
+We only changed a few things since the last release candidate, all in
+- A bug in the locale module was fixed that affected locales which
+ define no grouping for numeric formatting.
+- A few bugs in the weakref module's implementations of weak
+ dictionaries (WeakValueDictionary and WeakKeyDictionary) were fixed,
+ and the test suite was updated to check for these bugs.
+- An old bug in the os.path.walk() function (introduced in Python
+ 2.0!) was fixed: a non-existent file would cause an exception
+ instead of being ignored.
+- Fixed a few bugs in the new symtable module found by Neil Norwitz's
What's New in Python 2.1c2?