iCal adding alert for 35791394 minutes after events

I have the same problem. Creating or editing events in Calendar on the Mac makes alerts at the time of the event on both iOS devices I use, but not on the Mac. All my default alerts are turned off on all devices.

I hope they fix this; it's an annoying bug.

I heard a rumor that iOS6 will probably fix this problem (iOS6 has already been given to the development community to try out before the public). I think iOS6 is coming out later this week- probably when the new iPhone goes on sale. Hopefully these phantom alert settings go away after upgrading the iphones or ipads to version 6.

BTW the "At time of event" alerts never actually happen with me on my devices, as in no sound or banner alerts to get my attention. Only the alerts I actually set worked. So this bug is not as annoying to me as it could be if every single calendar event gave a warning- it's just annoying for me to see them in the event settings.

I'm having a similar issue. MacBook Pro with OS 10.8.2, iPhone 4s with iOS5.1.1. Syncing iCloud calendars.

All default event alerts are turned off everywhere for all devices.

Created on Mac -> Result on iPhone

1. Event at 9 AM with no alert -> Event at 9 AM with alert at time of event

2. All day event with no alert -> All day event with alert at time of event (12 AM)

3. All day event repeating each year with no alert -> All day event repeating each year with alert at time of event (12 AM)

4. All day event repeating each year with alert on day of event at 9 AM -> All day event repeating each year with alert on day of event at 9 AM and with alert at time of event (12 AM)

It appears that the iPhone is adding an alert at the time of event even though default alert times are set to none. None of these alerts at time of event on the iPhone are showing up on the Mac event details.

Created on iPhone -> Result on Mac

1. Event at 9 AM with no alert -> Event at 9 AM with no alert

2. All day event with no alert -> All day event with no alert

3. All day event repeating each year with no alert -> All day event repeating each year with no alert

4. All day event repeating each year with alert on day of event at 9 AM -> All day event repeating each year with alert on day of event at 9 AM

It appears that the Mac accepts the event from the iPhone exactly as is with no alterations.

Created on Mac -> Edit on iPhone -> Result on Mac

1.-4. In all situations, I edited the event on the iPhone to delete alert at time of event -> no alert on Mac (it was never there to begin with)

Created on iPhone -> Edit on Mac -> Result on iPhone

1.-4. In all situations editing the event on the Mac adds an alert at the time of event on the iPhone.

It seems the common denomenator here is that creating or editing an event on the Mac is somehow causing the iPhone calendar to automatically add an alert at the time of event even though default alert times everywhere on both devices are set to none.

Last, I did a test to see if the "phantom" alerts at time of event on the iPhone actually go off. They did not.

Upgrade the iPhone to iOS 6. It solves the problems.

FWIW, iOS 6 has also eliminated this bug for me.

I also often experience this bug.

I'm holding off on iOS6 until Maps is fixed, but from what I'm hearing iOS6 should fix the 35791394 iCal bug.

Unfortunately some of us have devices that can't be upgraded to iOS 6. :-(

I have an iPhone 4 that has been upgraded to iOS6 (and Mountain Lion is up to date) and I still get this garbage. I find my events littered with multiple alerts set to MAXINT. The bug has not been properly fixed.