fwiw: warning on Ubuntu 9.04

Am getting a "DeprecationWarning: the sets module is deprecated" on Ubuntu 9.04

Full log attached below:

(ipytest)afo <at> ubuntu:~/ipytest$ easy_install ipython
Searching for ipython
Reading http://pypi.python.org/simple/ipython/
Reading http://ipython.scipy.org
Reading http://ipython.scipy.org/dist
Best match: ipython 0.9.1
Downloading http://ipython.scipy.org/dist/ipython-0.9.1.tar.gz
Processing ipython-0.9.1.tar.gz
Running ipython-0.9.1/setup.py -q bdist_egg --dist-dir /tmp/easy_install-dDTwm0/ipython-0.9.1/egg-dist-tmp-w5Hv1p
/tmp/easy_install-dDTwm0/ipython-0.9.1/IPython/Magic.py:38: DeprecationWarning: the sets
module is deprecated
  from sets import Set
Adding ipython 0.9.1 to easy-install.pth file
Installing iptest script to /home/afo/ipytest/bin
Installing ipythonx script to /home/afo/ipytest/bin
Installing ipcluster script to /home/afo/ipytest/bin
Installing ipython script to /home/afo/ipytest/bin
Installing pycolor script to /home/afo/ipytest/bin
Installing ipcontroller script to /home/afo/ipytest/bin
Installing ipengine script to /home/afo/ipytest/bin

Installed /home/afo/ipytest/lib/python2.6/site-packages/ipython-0.9.1-py2.6.egg
Processing dependencies for ipython
Finished processing dependencies for ipython
(ipytest)afo <at> ubuntu:~/ipytest$ ipython
/home/afo/ipytest/lib/python2.6/site-packages/ipython-0.9.1-py2.6.egg/IPython/Magic.py:38:
DeprecationWarning: the sets module is deprecated
  from sets import Set
Python 2.6.2 (release26-maint, Apr 19 2009, 01:56:41) 
Type "copyright", "credits" or "license" for more information.

IPython 0.9.1 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object'. ?object also works, ?? prints more.

In [1]: