I use stablehost.com for hosting (which I love) and they just sent me this email...
Hello Bob -
Wordpress released Wordpress 3.3.2 this morning as there's been a security issue with 3.3.1. If you are running Wordpress, please update to 3.3.2 TODAY. We are sending this email to all users, therefore if you don't run Wordpress, you can safely ignore.
If you do run Wordpress and do not upgrade today, you will be receiving an email every day until you do upgrade. We will soon be suspending accounts that are not up to date as they are getting hacked and affecting our other customers.
- The SH Team