Duplicate birthdays in Calendar after iOS 6
Recently updated my iPhone 4 to iOS 6. A person's birthday showed up twice, then 3x, 4x, now 6x in my calendar. I can't delete any of them and they keep multiplying.
I enabled Facebook integration when I updated to iOS 6.
I am not using iCloud. iCloud Contacts and Calendars sync are off.
My calendar syncs to gMail.
If I go to my Google calendar online, the birthday shows up only once.
4x duplicate birthdays: Calendar - my gmail account. Accepted: Contacts
2x Calendar - my gmail account
All of the duplicate events have the same note "Today is Jane Doe's birthday!"
The "correct" birthday comes from the iPhone contact.
Capitalization of the events are slightly different. With the one from the iPhone contact, it reads like "Jane Doe's Birthday". All of the duplicates have a lower-case "b" - "Jane Doe's birthday".
At first I thought it might have something to do with FB integration, but one person's birthday is listed 6x whose info is only in my iPhone contacts - he doesn't have a FB account. Oddly enough, people who I'm FB friends with, but didn't have an iPhone contact for before iOS6, their birthdays only show up once.