Apple has just released an update to iOS, labeled iOS 4.0.2. The update, amongst other things, plugs the PDF security hole most notably used by the website The update is available for the iPhone 3G, 3GS, and 4, iPod Touch 2G and 3G, as well as the iPad. If you have a jailbroken device, or think you might want to jailbreak your device at some point, we would recommend against applying this update. Everyone else, have at it!