MediaMonitor, Airtimenotifier error on 1.9.4.13

Someone have an idea ?

When the system try to add files in watched folders, we have this errors...
and MediaMonitor restart (due to monit i presume)

2011-11-01 19:06:14,582 ERROR - [Thread #4] [airtimenotifier.py : update_airtime()] : LINE 177 - failed updating filepath: /srv/users/music/Boom_Clap_Bachelors_Lob_stop_sta.mp3
2011-11-01 19:06:14,603 ERROR - [Thread #4] [airtimenotifier.py : update_airtime()] : LINE 178 - Exception: list index out of range
2011-11-01 19:06:15,013 ERROR - [Thread #2] [airtimenotifier.py : update_airtime()] : LINE 177 - failed updating filepath: /srv/users/music/Funky_DL_Son_Of_A_Brown Bomber.mp3
2011-11-01 19:06:15,013 ERROR - [Thread #2] [airtimenotifier.py : update_airtime()] : LINE 178 - Exception: list index out of range
2011-11-01 19:06:15,039 ERROR - [Thread #1] [airtimenotifier.py : update_airtime()] : LINE 177 - failed updating filepath: /srv/users/music/Martin_Parks_Far.mp3
2011-11-01 19:06:15,040 ERROR - [Thread #1] [airtimenotifier.py : update_airtime()] : LINE 178 - Exception: list index out of range
2011-11-01 19:06:15,050 ERROR - [Thread #0] [airtimenotifier.py : update_airtime()] : LINE 177 - failed updating filepath: /srv/users/music/MOSCA-The-Way-We-Were.mp3
2011-11-01 19:06:15,071 ERROR - [Thread #0] [airtimenotifier.py : update_airtime()] : LINE 178 - Exception: list index out of range
2011-11-01 19:06:15,149 ERROR - [Thread #3] [airtimenotifier.py : update_airtime()] : LINE 177 - failed updating filepath: /srv/users/music/Active_Child_Hanging_On.mp3
2011-11-01 19:06:15,149 ERROR - [Thread #3] [airtimenotifier.py : update_airtime()] : LINE 178 - Exception: list index out of range