Right after releasing iTunes 10.5, Apple has begun seeding developers with the iTunes 10.5.1 beta, which also includes the latest iTunes Match beta. Like before, the release notes mention iCloud libraries will be deleted at the end of the beta. Of course it also comes with the usual bug fixes and enhancements, but we’ll let you know if we find anything interesting. Full release notes after the break.

The official Twitter iOS client has also been given an update today (via MacStories), bringing an “enhanced sign up experience”, the ability to upload photos to pic.twitter.com, and a redesigned direct message UI for iPad. The improved sign up experience comes courtesy of iOS 5’s ability to access Twitter account data from the Settings app, opposed to re-authenticating manually. You can grab version 3.5.0 from the App Store now.

iTunes 10.5.1 Beta 1 Release Notes

iTunes 10.5.1 beta 1 includes several performance enhancements and bug fixes, and is a required update for all subscribers to iTunes Match beta. iTunes Match is not included in the iTunes 10.5 GM release

Your iCloud libraries will be deleted at the end of this beta.

Backup regularly and do not delete the music you add to iCloud from your computer. Apple may periodically delete all iCloud libraries during the beta period. This will require you to scan, match, and upload songs again. Also note that some of the features and optimizations of iTunes Match may not be available during this beta.

About Subscribing

iTunes Match beta is available to iOS developers in the United States.

  • iTunes Match beta is available as an automatically renewing subscription for $24.99 per year. You may cancel at any time from your Account settings.

  • You can subscribe to iTunes Match using iTunes 10.5.1 beta 1 on your Mac. iTunes Match is not available with iTunes for Windows at this time. You cannot subscribe to iTunes Match from your iOS device.

  • You can access your iCloud library on your iPhone, iPad, iPod touch with iOS 5, or your other computers with iTunes 10.5.1 beta 1.

  • Once subscribed, you can add up to 25,000 songs to iCloud, and iTunes purchases do not count against this limit. iTunes Match will not add your apps, books, movies, TV shows, ringtones, and audiobooks to your iCloud library. These items can continue to be synced to your iOS device with iTunes. iTunes LPs and iTunes Extras are also unsupported.

  • iTunes Match includes limits to how you may access your iCloud library:

  • –  You can use iTunes Match on up to 10 computers and iOS devices, up to five of which can be computers authorized with your Apple ID.

  • –  You can only associate computers and devices with a different Apple ID once every 90 days.

  • Install iTunes 10.5.1 beta 1 on your Mac

  • Open iTunes and choose Turn On iTunes Match from the Store menu

  • Click the Subscribe for $24.99 button and follow the onscreen instructions. Oncecomplete, your Music library will include songs on your computer and in iCloud.

  • –  You can use iTunes Match on up to 10 computers and iOS devices, up to five of which can be computers authorized with your Apple ID.

  • –  You can only associate computers and devices with a different Apple ID once every 90 days.

Once iTunes has completed matching your music with the iTunes Store, you may begin accessing your iCloud library:

  • From your iOS device:

  • Tap Settings > Music > turn iTunes Match ON.This will disable syncing music with iTunes.

  • Press the Home button and tap Music.

  • From your other computers:

  • Install iTunes 10.5.1 beta 1 on your other Macs

  • Open iTunes and choose Store > Sign In. Sign in using the same Apple ID you usedto subscribe to iTunes Match.

  • Choose Store > Turn On iTunes Match

  • Click the Add This Computer button

  • Once complete, your Music library will include songs on your computer and iniCloud.

  • Known Issues

  • 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.

  • Tap Settings > Music > turn iTunes Match ON.This will disable syncing music with iTunes.

  • Press the Home button and tap Music.

  • Install iTunes 10.5.1 beta 1 on your other Macs

  • Open iTunes and choose Store > Sign In. Sign in using the same Apple ID you usedto subscribe to iTunes Match.

  • Choose Store > Turn On iTunes Match

  • Click the Add This Computer button

  • Once complete, your Music library will include songs on your computer and iniCloud.

Known Issues

  • –  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.