After Lion upgrade the address book is loosing Phone Numbers

[LeChuck]

i noticed that now i have some address book entries without any phone numbers which where available before and unassigned phone numbers in my recent calls tab on my iPhone :-(
this also includes email addresses i suspect :-(

ideas anyone?
beside immediately disabling address book sync?

[lcx]

same problem without Lion.
My account is fine which I'm using since almost a year. (OS X 10.6.8 + iPhone 4)
But added a new account on a different machine with OS X 10.6.8 + iPhone 3GS, contacts are all ok and after a couple of days phone numbers start disappearing and all other contact details as well. The contacts remain in the addressbook.

[ewilen]

I would check to see if there are any duplicate contacts in the affected account.

[StPaulie]

I had the same problem.. Really scary bug! Now downgraded to Snow Leopard and hoping for a better world