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Existing iPhone users can update their operating system for free via iTunes to version 3.0, and take advantage of a number of longed-for new features such as cut-and-paste, spotlight search and a landscape virtual keyboard. However, Sophos experts note that Apple has also included a number of important security patches inside the update, making it crucial for both sets of users to patch as quickly as possible. Sophos warns that the iPod Touch customers are required to pay 9.95 USD for the privilege.

According to an advisory on Apple’s website, iPhone OS 3.0 patches 46 vulnerabilities, including some that could potentially allow hackers to run malicious code on a user’s iPhone if they visited a booby-trapped website or viewed a specially-crafted image file.

"If left unpatched, hackers could run malware on your iPhone just by you visiting a website or viewing a maliciously-crafted image," explained Graham Cluley, senior technology consultant at Sophos. "Although we haven’t come across any examples of hackers creating malware to exploit these vulnerabilities as yet, it is vital that iPhone and iPod Touch users understand the importance of this latest update. Without it, they are leaving themselves potentially wide open to attack - it pays to remember that no operating system is invincible."

"There’s no doubt that some iPod Touch users will be unhappy that they have to pay for their devices to be fixed, and it’s certainly unusual for a company to charge for important security patches like this," continued Cluley. "In an ideal world Apple would make free fixes available for iPod Touch users who don’t feel they need cut-and-paste and other new features, but do want to be able to use the internet securely."