Comment 3 for bug 451125

I can reproduce fairly reliably from home.
Here is the interesting bit of log:

DEBUG MainThread grooveshark_tracks_preview_list_controller oct. 18 15:07:47 start playing (elisa/plugins/grooveshark/actions.py:146)
DEBUG MainThread grooveshark_resource_provider oct. 18 15:07:47 sending request: {"header": {"sessionID": "b9989eabde12ad58122060c463c63c16"}, "method": "song.getStreamUrlEx", "parameters": {"songID": 86312}} (elisa/plugins/grooveshark/resource_provider.py:298)
DEBUG MainThread grooveshark_resource_provider oct. 18 15:07:48 sending request: {"header": {"sessionID": "b9989eabde12ad58122060c463c63c16"}, "method": "song.getStreamUrlEx", "parameters": {"songID": 86312}} (elisa/plugins/grooveshark/resource_provider.py:298)
DEBUG MainThread grooveshark_track_model oct. 18 15:07:48 caching playable model (elisa/plugins/grooveshark/models.py:231)
DEBUG MainThread grooveshark_tracks_preview_list_controller oct. 18 15:07:48 successfully downloaded first track (elisa/plugins/grooveshark/actions.py:149)
DEBUG MainThread grooveshark_track_model oct. 18 15:07:48 returning prefetched playable model (elisa/plugins/grooveshark/models.py:288)
DEBUG MainThread grooveshark_track_model oct. 18 15:07:48 deleting cached model (elisa/plugins/grooveshark/models.py:283)
WARN MainThread default oct. 18 15:07:48 Gstreamer Impossible d'ouvrir la ressource en lecture.:gstsouphttpsrc.c(980): gst_soup_http_src_parse_status (): /GstPlayBin:playbin2/GstSoupHTTPSrc:source:
400 Bad Request (elisa/plugins/poblesec/player_video.py:611)