Hi!
Sorry for not being clear. I attach a short screencast.

Here is the terminal output:

raffa@raffa-laptop:~$ luciole -v
2010-02-07 13:22:47,945 - luciole - INFO - MainThread - (luciole.py, 123) - Starting luciole
2010-02-07 13:23:02,220 - luciole - DEBUG - MainThread - (gui_controller.py, 190) - (' language : ', None)
2010-02-07 13:23:02,221 - luciole - DEBUG - MainThread - (gui_controller.py, 205) - ('locale path', '/usr/share/luciole/po')
2010-02-07 13:23:02,392 - luciole - DEBUG - MainThread - (lcl_gst_base.py, 120) - /GstPipeline:Sound pipe (Pipeline)
2010-02-07 13:23:11,187 - luciole - DEBUG - MainThread - (luciole_controller.py, 650) - ---------------------------------------------------------------------
2010-02-07 13:23:11,188 - luciole - DEBUG - MainThread - (luciole_controller.py, 651) - Luciole_controller project info: 
2010-02-07 13:23:11,188 - luciole - DEBUG - MainThread - (luciole_controller.py, 652) - ---------------------------------------------------------------------
2010-02-07 13:23:11,188 - luciole - DEBUG - MainThread - (luciole_controller.py, 654) - **capture_images** : ['rush_00000.jpeg', 'rush_00001.jpeg', 'rush_00002.jpeg', 'rush_00003.jpeg', 'rush_00004.jpeg', 'rush_00005.jpeg', 'rush_00006.jpeg', 'rush_00007.jpeg', 'rush_00008.jpeg', 'rush_00009.jpeg', 'rush_00010.jpeg', 'rush_00011.jpeg', 'rush_00012.jpeg', 'rush_00013.jpeg', 'rush_00014.jpeg', 'rush_00015.jpeg'] 
2010-02-07 13:23:11,189 - luciole - DEBUG - MainThread - (luciole_controller.py, 654) - **project_name** : dssdf 
2010-02-07 13:23:11,189 - luciole - DEBUG - MainThread - (luciole_controller.py, 654) - **tmp_dir** : tmp 
2010-02-07 13:23:11,189 - luciole - DEBUG - MainThread - (luciole_controller.py, 654) - **export_dir** : export 
2010-02-07 13:23:11,189 - luciole - DEBUG - MainThread - (luciole_controller.py, 654) - **project_path** : /home/raffa/Test/dssdf/dssdf.xml 
2010-02-07 13:23:11,189 - luciole - DEBUG - MainThread - (luciole_controller.py, 654) - **fpi** : 5 
2010-02-07 13:23:11,190 - luciole - DEBUG - MainThread - (luciole_controller.py, 654) - **is_modified** : 0 
2010-02-07 13:23:11,190 - luciole - DEBUG - MainThread - (luciole_controller.py, 654) - **rush_images** : ['rush_00000.jpeg', 'rush_00001.jpeg', 'rush_00002.jpeg', 'rush_00003.jpeg', 'rush_00004.jpeg', 'rush_00005.jpeg', 'rush_00006.jpeg', 'rush_00007.jpeg', 'rush_00008.jpeg', 'rush_00009.jpeg', 'rush_00010.jpeg', 'rush_00011.jpeg', 'rush_00012.jpeg', 'rush_00013.jpeg', 'rush_00014.jpeg', 'rush_00015.jpeg'] 
2010-02-07 13:23:11,190 - luciole - DEBUG - MainThread - (luciole_controller.py, 654) - **xml_filename** : dssdf.xml 
2010-02-07 13:23:11,190 - luciole - DEBUG - MainThread - (luciole_controller.py, 654) - **rush_dir** : rush 
2010-02-07 13:23:11,191 - luciole - DEBUG - MainThread - (luciole_controller.py, 654) - **chrono_images** : ['rush_00000.jpeg', 'rush_00001.jpeg', 'rush_00002.jpeg', 'rush_00003.jpeg', 'rush_00004.jpeg', 'rush_00005.jpeg', 'rush_00006.jpeg', 'rush_00007.jpeg', 'rush_00008.jpeg', 'rush_00009.jpeg', 'rush_00010.jpeg', 'rush_00011.jpeg', 'rush_00012.jpeg', 'rush_00013.jpeg', 'rush_00014.jpeg', 'rush_00015.jpeg'] 
2010-02-07 13:23:11,191 - luciole - DEBUG - MainThread - (luciole_controller.py, 654) - **project_dir** : /home/raffa/Test/dssdf 
2010-02-07 13:23:11,191 - luciole - DEBUG - MainThread - (luciole_controller.py, 654) - **hardtype** : 3 
2010-02-07 13:23:11,191 - luciole - DEBUG - MainThread - (luciole_controller.py, 655) - ---------------------------------------------------------------------
2010-02-07 13:23:11,548 - luciole - DEBUG - MainThread - (luciole_controller.py, 674) - load time = 0.36080789566
2010-02-07 13:23:22,003 - luciole - DEBUG - MainThread - (lcl_gst_base.py, 120) - /GstPipeline:Play pipe (Pipeline)
2010-02-07 13:23:35,698 - luciole - INFO - MainThread - (luciole.py, 137) - Leaving luciole


Is the second recommended command     luciole -    ?


Anyway, playing with my laptop I found a solution (or workaround?).
Enabling Nvidia proprietary 3D driver makes the playback work again.
I have a Quadro card.

Grazie
Raffaella