Apple has updated iTunes to version 10.5.2, fixing an audio distortion issue when playing or importing specific CD types as well as adding improvements to its iTunes Match service.
What’s new in iTunes 10.5.2
iTunes 10.5.2 includes several improvements for iTunes Match and fixes an audio distortion problem when playing or importing certain CDs.
Apple has been vague on the improvements included to their iTunes Match service, so let us know if you see any specific changes in the comments. You can grab the update from the Apple Software Update Utility or as a direct download from the website.