cat foo.mp3 | mpg321 -o oss - (or using esd) seems to cause skips/jumps in
playback. ogg123 and the sox play command do not exhibit these problems on
sblive (using kernel 2.4.19-pre8).
Try `mpg321 -o oss - < foo.mp3'. I've noticed with other things that 'cat'
isn't too great at feeding audio to programs.
At this point, we probably won't fix mpg321 bugs.