Dropbox has released an update to its cloud file sharing app for iOS devices with a new UI design, Retina Display support and support for background file transfers on multitasking-capable iOS 4 devices. Dropbox 1.3 also adds the ability to view files in a full-screen view while using the app in landscape mode on the iPad, file caching to allow users to re-open files they have recently viewed and the ability to create folders from directly within the…
