When I click on the "next month link" inside the calendar, it gets loaded via ajax. The problem is that characters with accents (my locale is set to french) aren't displayed correctly. For example "é" gets displayed as "Ã©" which is its utf8 form. I checked the script and if I add uft8_decode() to the function displaying the month name it fixes the pb but I don't think it's the proper way to do it. The charset of my pages is set to utf8.