by Jukka Vähäaho.
Found reason, there cannot be scandinavian characters like ä in section name. For example In finnish june is kesäkuu. So i must edit those sections names or use different format than weekly format.
Scandinavian characters were ok in Moodle 2.2. Can somebody tell is there any way to change this in Moodle 2.4?
~ Jukka ~