Yesterday's release of iOS 5 beta 7 made changes to the way the iTunes Match service -- which automatically populates a user's iCloud storage with songs they have various devices so that they can be spontaneously downloaded onto an iOS device -- to prevent the service from "streaming" the song into a temporary cache that is eventually deleted. In the previous v6.1 beta, requesting an iCloud-stored song would cause it to almost immediately start playing but not be permanently stored.
