Alongside iTunes 10.5 final release Apple begun seeding iTunes 10.5.1 beta to developers with iTunes Match beta. iTunes 10.5.1 beta includes enhancements, and fixes, and it is a recommended update for all of the iTunes Match beta subscribers.
- The scan & match feature is not yet complete.
- Some songs may not match (even if they is available in the iTunes Store) and will be uploaded to iCloud.
- Other songs may match to a different version of the same song on the iTunes Store.
- You can only add music to iCloud from one computer at a time.
If you are a registered Apple developer then head to iOS Dev Center to download iTunes 10.5.1 beta with iTunes Match beta.