The next update to iOS 7 was theoretically was slated for early next week going by Apple’s usual schedule, but it seems Apple has pushed Beta 6 to developers a little early. The company notes the small patch corrects an “issue with iTunes in the Cloud, where some purchases may download or play unexpected items.”
The file is only 13.5 MB, and it’s rare for Apple to seed beta updates to devs on a Thursday evening (especially considering Beta 5 was just released last week), so it seems the bug was important enough to fix fairly quickly. The build number is 11A4449d, and it’s available as an over-the-air update to any developer running iOS 7 Beta 5.
Sources from : http://www.technobuffalo.com/2013/08/15/ios-7-beta-6-available/