Please describe the problem:
Am running rhythmbox 0.10.0 on ubuntu feisty fawn. 
Have mt-daapd (svn-1549) on Debian, which
transcodes .ogg files to a .wav stream on-the-fly, and serves them as such
(since some clients don't read ogg) This works fine with my roku soundbridge, as with rhythmbox (used to be an issue, but isn't any more, see bug 350276), but rhythmbox seems to leak memory in the process.

Right now, top claims the rhythmbox process is using 20% of my 1Gb (plus 2 Gb swap), ps -AF returns

[indridi@edelstoff][...indridi/leit] ps -AF | grep rhy
indridi 2014 1893 5 92178 227772 0 22:29 pts/4 00:01:58 rhythmbox

The leak seems to be related to the format of music being streamed from the md-daapd server. When streaming .ogg or .mp3 files directly, the memory usage stays stable (although the memory it has already eaten isn't returned), but when playing a stream which is transcoded in .wav format before streaming, the memory usage rises continuously, e.g. now, approx 5 minutes later than the previous ps -AF, it now returns

indridi 2014 1893 5 102601 276808 0 22:29 pts/4 00:02:02 rhythmbox
This process, if left alone, ends up eating all the memory on my system, the 1GB physical memory, and enough of the swap for the system to become totally unresponsive

Someone here might know if this is caused by rhythmbox, or maybe gstreamer.

Playing ogg (or mp3) files from mt-daapd without any transcoding works fine.

Steps to reproduce:
1. Serve music off of a mt-daapd server, use transcoding option, as is necessary for some clients
2. connect to the shared music with rhythmbox.
3. double click on a song, which the mt-daapd server will transcode on the fly and serve as a wav file


Actual results:
Rhythmbox plays the tune, but keeps reserving more and more memory.

Expected results:
Rhythmbox shouldn't eat up all my precious memory.

Does this happen every time?
yes.

Other information:
Have run rhythmbox using valgrind 

G_SLICE=always-malloc G_DEBUG=gc-friendly valgrind -v --tool=memcheck --leak-check=full --num-callers=40 --log-file=valgrind.log rhythmbox

 for around five minutes (the system is almost unusable - valgrind is heavy), during which I start rhythmbox, connect to a mt-daapd share, an play one song through and half of another, then I quit the program. During this time, the memory ps -AF claims rhythmbox uses rose continuously the whole time, a few Mb a minute.