Postnuke 0.7.2.2 has been released. From the freshmeat page:
A new free banner positioning and a new banner sideblock were implemented. All modules and the core have been secured against cross site scripting and other attacks. A new visual editor with upload capabilities was enabled. A new members list was created. Hundreds of bugfixes were made. Adodb was upgraded to 2.50. Support was added for register_globals = off (for full compatibility with php 4.2x and above. Apache 2.0.x is now supported. The pnIntrusion detection system was enhanced. Admin settings were added for censor, pnAnticracker, and article display. New admin icons were added. wBloggar support was added.