Electronics firm Apple has admitted there have been problems with its new iPod Nano music player, after a string of complaints about damaged screens.
The smaller version of the popular iPod was hailed as a design breakthrough when it was unveiled a few weeks ago, with the cheapest model costing £140.
Apple says a manufacturing problem has left screens on one batch vulnerable to cracks and is offering replacements.
It says the problem affects fewer than a tenth of 1% of all Nanos shipped.
However, it denies claims the Nanos are more prone to scratching than other models.
Owners have been complaining about cracked, scratched or inexplicably failing screens, sometimes within hours of buying the machine.