I made a new test build ( scummvm_0.11.99-2) of scummvm 0.12 with new version of tremor (libvorbisidec1_1.2.0-1.svn20080906.tk1) in extras-devel. For me it works with mp3 and ogg files, but I don't know if flac really works.

scummvm_0.11.99-3 also incules patch which shows name "ScummVM" instead of "unknown" in taskswitcher. You have to switch once to fullscreen mode before it works