Please describe the problem:
I try to make as simple GNonLin operation as playback of only a few seconds of audio file. I use code from http://www.jonobacon.org/files/gnonlin-tutorial1.py In most cases it works well but for some mp3 files (e.g. like http://saepia.net/linux/bugs/the_juju_orchestra-kind_of_latin_rhythm.mp3) it plays indefinitely instead of playing just a few seconds of file. I realized that totem also acts weird on that file - the time counter don't work smoothly, the duration between e.g. "00:01" and "00:02" isn't always 1 second, sometimes it changes time for 1 second back (!). Seems like there's a problem with estimating position in file.

Steps to reproduce:
1. Download http://www.jonobacon.org/files/gnonlin-tutorial1.py
2. Download http://saepia.net/linux/bugs/the_juju_orchestra-kind_of_latin_rhythm.mp3
3. Adjust line 45 of gnonlin-tutorial1.py and set there correct path to mp3 file
4. Run gnonlin-tutorial1.py


Actual results:
MP3 isn't stopping after 5 secs and plays from beginning, not from 00:10 position.

Expected results:
Only 00:10-00:15 of MP3 file is played.

Does this happen every time?
Yes

Other information:
Ubuntu 7.10.
gnonlin 0.10.7-1