Dropbox for iOS update adds a PDF viewer and file share notifications

Earlier today, dropbox rolled out version 2.1 of its ios app with a trio of enhancements in tow. The update, which requires iOS 5.0 or higher introduces a new PDF viewer, file sorting by date modified, and push notifications for when someone shares a folder with you (which were also recently added to the Android client). Whether you're a Dropbox power user or the casual type, this new software bump should definitely come in handy.