Just upgraded to F12 and noticed some weirdness with my sound, long story short, the Gstreamer backend appears to work fine, the Xine doesn't. My current levels are phonon-backend-gstreamer-4.3.80-2.fc12.x86_64 phonon-backend-xine-4.3.80-2.fc12.x86_64 phonon-4.3.80-2.fc12.x86_64 and my xine levels are: xine-plugin-1.0.2-3.fc12.x86_64 xine-lib-extras-1.1.16.3-5.fc12.x86_64 xine-lib-extras-freeworld-1.1.16.3-2.fc12.x86_64 xine-ui-skins-0.99.5-16.fc12.noarch xine-lib-1.1.16.3-5.fc12.x86_64 xinetd-2.3.14-28.fc12.x86_64 xine-lib-devel-1.1.16.3-5.fc12.x86_64 phonon-backend-xine-4.3.80-2.fc12.x86_64 xine-ui-0.99.5-16.fc12.x86_64 I saw that several other people were having various issues and wanted to make sure I'm not missing something silly before I head out to bugzilla. Thanks!
