The Security Mentor

Apple released a software update for iTunes recently. It fixes a security problem with playlist files. A bad guy could build a toxic playlist file that could take over your machine, in theory. Today it's no longer theoretical. Bad guys can now download an example program that builds toxic playlist files. Bad guys can take this and change it to do their own bad things. They will. Usually it's only a few days from the release of an example like this to the appearance of wild viruses.

If Software Update pops up and asks to update iTunes, tell it yes. If you haven't seen Software Update in a while, bring up System Preferences (it's the thing in the Dock with a light switch) and click Software Update.