Please bare with me! I am not a techie person, I am yet a medical student.
Anyway, WordPress has just recently released the latest version 3.1.4 and the 3.2 release candidate 3.
WordPress 3.1.4 is a security update of the previous releases.
For more information about the WordPress 3.1.4 (and 3.2 Release Candidate 3) head on to wordpress.org/news now!