I have linuxmint 4.0 community kde installed and evolution as mail client and organizer, but when I trying to add new meeting to organizer its impossible because it shows "Invalid date!", and don't wants to save. Linux mint is in Polish localization then date shows: "28 mar 2008", any manipulation ends with failure. I can not install new version (actual 2.12.1), becauseof too newer depandencies. It may probubly help to change repositories to newer, but I dont know what to do that.