I setup iCloud last night from my iPhone and when I log onto iCloud.com I see 2 or 3 birthday reminders for every contact I have. Also, when I go into a contact, some dates like anniversary, show up twice in their contact information. I obviously did not set up their anniversary twice. I use Microsoft Outlook 2007 on a PC and I had trouble with mobileme and that problem years ago, so I never used mobileme.