Alsa "file descriptor in bad state" in rhythmbox

Hello,

I have a question about an ALSA error :
AL lib: (EE) alsa_reset_playback:snd_pcm_hw_params(data->pcmHandle, hp) 
failed: File descriptor in bad state
that :
1. sometimes completely hangs up rhythmbox (kill necessary)
2. often jumps to next song
3. sometimes plays right the selected song
since my last switch from Debian stable to testing.

The problem occurs only on my laptop, not my desk PC.

I am an occasional DJ (selecta) using rhythmbox as a prelistening tool 
with the internal soundcard.
The problem does not occur on decibel which I use for main output with 
the external soundcard. alsaplayer works well also.

I am using .asoundrc for the mapping software/soundcard, and alsasink in 
the gstreamer configuration.

It seems to be a problem of rhythmbox, as decibel is working fine, but 
should I ask  the debian package maintainer, or is it a pure gstreamer 
or alsa problem ?
It is not critical because I can restart RB as much as necessary, but is 
clearly a major and stressing issue for me to have to kill an app during 
an event ...

What would you recommend me to solve this issue ?
Of course I could try to reinstall, or to revert to a stable 
distribution, but this is not exactly the spirit.

Many thanks

-- 
Laurent Pouillet