Date with Commerce Fieldgroup Panes

I get this issue on a date field on a commerce order with Commerce Fieldgroup Panes, updating the widget to popup calendar and I get the errors:

Notice : Undefined index: time dans date_popup_input_date() (ligne 522 dans /my.site/sites/all/modules/date/date_popup/date_popup.module).
Notice : Undefined index: time dans date_popup_process_time_part() (ligne 419 dans /my.site/sites/all/modules/date/date_popup/date_popup.module).
Notice : Undefined index: time dans date_popup_input_date() (ligne 522 dans /my.site/sites/all/modules/date/date_popup/date_popup.module).
Notice : Undefined index: time dans date_popup_process_time_part() (ligne 419 dans /my.site/sites/all/modules/date/date_popup/date_popup.module).

I am using locale with french date format, this might be the issue because the error states : wrong date format.
Is that the same kind of issue than http://drupal.org/node/1380066 ?

I have also configured the date widget as list, but I still cannot store date and time because of wrong format somewhere (In that case, I have no errors though).

Any help welcome.