WordPress has announced another upgrade for a bug which allowed users to view future posts using a URL. Fortunately I fixed that bug earlier as Ryan from Cybernet news had spotted it early and also shown a way to fix it. Thankfully now WordPress itself has fixed the issue and I upgraded it using WordPress Automatic Upgrade.
You can view a list of complete changes in WordPress 2.3.2 here. It is highly recommended that you upgrade your version immediately.
On a side note if you are using the WPAU plugin and it is not working for you, here are some helpful tips that will allow you to fix it. The issue is that the plugin cannot write files to the system in particular folder. In order to fix that please change all directory permissions to allow web server to write files to the system. You can change permissions to 777 and go ahead with the update and it should work seamlessly.
That said once the upgrade completes do not forget to change the permissions back to 644. You and also contact your system administrator for additional help on this.