Banshee is one of the strongly promoted new features and the default playerof SL
10.0. It doesn't play anything on RC2. Not even the progress bar of the title
that I tried to play is moving. 
Might be an ALSA problem: If I try to play songs with RythmBox, it doesn't play
as well, the error message appears: 

 "ALSA device "default" had an error.

See below the messages on the bash While trying to play a file and than switch
to a file from another playlist in banshee. 

lotmot@K21:~/My Music> banshee
0: Active Player Engine is now 'Helix'
1: Loaded PlayerEngine core: Helix
2: Loaded AudioCdPlayerEngine core: GStreamer
3: Audio CD Core Initialized
ALSA lib pcm_direct.c:202:(make_local_socket) chmod failed: /tmp/alsa-dmix-14891
-1126602825-128901: Operation not 
permitted
ALSA lib pcm_dmix.c:840:(snd_pcm_dmix_open) unable to create server
4: Registered Banshee.SqlLoadTransaction
5: Executing Banshee.SqlLoadTransaction
Helix Content State Changed: Stopped -> NotLoaded
HxError: : 
6: Registered Banshee.PlaylistLoadTransaction
7: Executing Banshee.PlaylistLoadTransaction
HxError: :