The sample at ftp://sandman.homedns.org/diego/ffmpeg/vorbis_artifacts.ogm plays with heavy sound artifacts when using FFmpeg's Vorbis decoder while Tremor is fine. I'm testing with MPlayer r19602 (G4, Debian unstable, gcc 4.1.2) while r19526 (K6-III, Debian stable, gcc 3.3.5) was fine. Diego