I just updated our server to Maverics and windows computers using Firefox cannot access the calendar either. A blank caledar appears and the shared calendars just don't exits. jheinen, have you found a solution?
Yeah I recognized the same issue. Firefox on Mac / Windows does not work with OS X Server 3.0. Other browsers do not have this issue (Tested with Safari and Internet Explorer 11). The biggest issue is accessing the webcal.
I belive its a bug that needs to be reported to Mozzila rather than Apple?