The new WordPress 3.1.2 is out. It is a security release addressed to a user vulnerability.
- Fix a vulnerability that allowed Contributor-level users to improperly publish posts.
- Fix user queries ordered by post count.
- Fix multiple tag queries.
- Prevent over-escaping of post titles when using Quick Edit for pages.
Should I upgrade?
You should always but it’s a low priority update if you don’t have any registered users in your site
Remember to backup your data before updating!