WordPress 2.8.3 has been released and addresses some addition privilege escalation security issues.
I did the automatic upgrade from WordPress 2.8.2 without incident. I did have someone try to hack this site once so I try and keep up with the security releases. Plus with the current WordPress automatic functions upgrades are mostly painless–knock on wood*.
*Knock on Wood – an expression used to express a desire to avoid tempting fate after making some boast or claim.