Playing a long mp3 file in totem, I get odd behaviour from from the seek bar. Dragging the thumb seeks, apparently correctly, but the duration shows 5 minutes instead of 90 minutes. The thumb advances during playback according to the smaller listed duration, and then fetches up against the right extreme where it sits while the rest of the file is decoded.

I've seen this with a static version of the streams listed on http://cerebrum.dnalounge.com/mixtapes/

Mike Smith looked at the same file this afternoon and suggested mpegaudioparse wasn't returning the duration correctly. An older gstreamer that autoplugged the libmad player directly behaved correctly.