Since the last spate of updates, it is no longer possible to use any sound or video* device as user, only as root. Changing the permission to 666 allows users to use the devices. I saw that on the pulseaudio thread on fedora-selinux-list. I hope there will be a fix soon. In the meantime, I manually change the permission of the device I need to use each time I boot the system. Sometimes it's not easy to figure out what device you need, though, like with the tv card or midi, for example.
