Dropbox has released an update to the iPhone application for its online file storage service. Dropbox 1.1 adds a several new features including support for locking the app with a passcode, copying file and image sharing links to the clipboard and adjusting photo and video upload quality settings. The update also adds full-screen document viewing, a scroll bar for navigating large documents and the ability to zoom in on photos. The search feature now allows users to search sub-folders and the application will default to displaying the last-used folder on startup. The Dropbox application requires an iPhone or iPod touch running OS 3.0 or later and is available from the App Store as a free download.