I almost missed this one. Plone 2.5.2 was released a few days ago. Plone is a CMS written in Python (something I know a lot about) that is built on the Zope application server (something I know very little about). The Plone 2.5.2 release is a bug fixer for the following:

• LiveSearch
  
• Unicode handling
  
• External Editor
• IE7 rendering

The original announcement from Plone.org can be read here and you can download the latest version of Plone on their download page.