Please describe the problem:
Every time a new track is started, several threads are created and the process size increases but when the track ends, two (or so) of the threads continue to run. After a while, the process runs out of memory.

Steps to reproduce:
1. Run rhythmbox and "fast forward" through tracks in the database (although just letting the player go the next track eventually produce the same result).
2. 
3. 


Actual results:
"top" shows more and more threads created in the rhythmbox process and more memory consumed until the process exhausts the system memory.

Expected results:
rhythmbox to use a more or less constant amount of memory.

Does this happen every time?
Yes.

Other information:
This is on Fedora 10 with a rhythmbox 0.11.6 downloaded from the website and compiled with GCC 4.3.2.