I'm currently running on the latest OSX beta, but I think this problem exists in all versions. Every time I log into my computer, my calendar pops up notification about various Brithdays, etc. even though those Calendars have been turned off in iCal. Now, even after dismissing it, they pop right back within 5 minutes as an alert on the screen. How the hell do I get rid of these? I'd like to keep the Notifications for meetings and stuff on the screen, but the birthday notifications are completely useless to me; more maddening because unlike other calendars, they won't go away if hushed. Anyone have a solution?