According to the folks at WordPress, version 2.1.1 may contain a security hole, and therefore, if you are running 2.1.1, upgrade it to 2.1.2 immediately.
Long story short: If you downloaded WordPress 2.1.1 within the past 3-4 days, your files may include a security exploit that was added by a cracker, and you should upgrade all of your files to 2.1.2 immediately.
For more info, visit the official WordPress Development Blog.
[tags]Wordpress, blog, blogging, wp, security[/tags]