Apple releases Security Update 2010-006

Yes, as you can see above (and in a Software Update near you), Apple has released Security Update 2010-006, the latest OS X issue-fixer of the year. It's recommended for all users, so run your SU, let it download and install, and you'll be good to go.

This one apparently fixes an issue where a remote attacker could have snuck into AFP shared folders without having a password. Apple releases OS Security Updates a few times a year, and given how simple it is to update and install them, you should go ahead and update as soon as possible.