This simple trick lets you crack the passwords on an iPhone or iPod touch – though it only threatens users who leave their device in hands reach of somebody they can’t trust.
The slight flaw can be exploited in almost every available application that stores passwords, including your saved email account passwords.
By simply using the delete button, an unauthorised person can reveal all the characters which make up your password, with the exception of the very first character in the password field. It works when a password field is present with a saved password in it.
The good news? This particular bug seems to have been patched in iPhone Software 3.1.
Perhaps that makes it a good reason to upgrade your Apple device – though users of jailbroken iPhones will probably wait a while.