Apple iTunes Releases Beta 3 version of the iTunes 10.5.1 with fixes said to be in the areas of “performance and stability” The following was a mesage issued to registered developer’s from the Apple development team.
Message from Apple to developers:
iTunes 10.5.1 beta 3 is now available. This update includes a number of important stability and performance improvements for iTunes Match. iTunes Match stores your music library in iCloud and allows you to enjoy your collection from anywhere, any time, on your iPhone, iPad, iPod touch, computer or Apple TV. In order to subscribe to iTunes Match, or continue using your existing subscription, please upgrade to iTunes 10.5.1 beta 3. Once upgraded, turn on iTunes Match on each of your computers and iOS devices. On your computer, choose Store > Turn on iTunes Match. On your iOS device, tap Settings > Music, then turn on iTunes Match. On your Apple TV, please turn off iTunes Match under Settings > General > iTunes Store. The songs on your computer should not be affected. As always, please backup regularly and do not delete the music you add to iCloud from your computer.
Apple iTunes Releases Beta 3 10.5.1 with Fixes
We have the downloadable links here for your convieniance if you wish to download it right away. Just chose from the links below for which suites your operating system. If you have windows and are unsure which version to chose, it’s always a safe bet to go with the 32 bit version.
ITunes Releases Beta 3 10.5.1 Download links:
iTunes Beta 3 10.5.1 With iTunes Match (Mac)
iTunes Beta 3 10.5.1 With iTunes Match (Windows)
iTunes Beta 3 10.5.1 With iTunes Match (Windows64)
iTunes Beta 3 10.5.1 Release notes

[...] the two to give developers more time to work on the iTunes Match service. You can download the iTunes 10.5.1 Beta 3 here Just follow the links provided at the bottom of the page, ensuring to chose the right Operating [...]