http://github.com/downloads/facebook/tornado/tornado-1.2.1.tar.gz

This release contains only two small changes relative to version 1.2:
* FacebookGraphMixin has been updated to work with a recent change to the
  Facebook API.
* Running "setup.py install" will no longer attempt to automatically
  install pycurl.  This wasn't working well on platforms where the best way
  to install pycurl is via something like apt-get instead of easy_install.

This is an important upgrade if you are using FacebookGraphMixin, but
otherwise it can be safely ignored.

-Ben