A Dropbox bug has left a number of users with missing files that may never be recovered. The issue, which affected those who enabled the Selective Sync feature, is now fixed, but Dropbox has conceded that it may not be able to rescue everything that has been lost. “Unfortunately, some of your files were deleted when the Dropbox desktop application was shut down or restarted while you were applying Selective Sync settings,” Dropbox told users in an email today. “Our team worked hard to restore files that were deleted from your account.”