Apple has modified its iTunes downloading technology to prevent users bypassing its anti-piracy controls.
A group of US and Norwegian programmers had joined forces to compromise Apple’s digital rights management software when downloading iTunes.
They developed the PyMusique software which allowed users to legitimately enter the Apple site and buy iTunes, but then strip out the blocks that restrict those tunes’ use.
PyMusique was initially written for Linux users but had recently been developed for Windows users too, which meant it posed an even bigger challenge to Apple and the music industry.
Apple said the loophole has now been fixed, although some of iTunes users may have to update their download software to enable them to continue using the iTunes service.