Hi there Longtran. I actually was trying last night for some reason I couldn't go beyond configuration of the account on my Mac. Kept getting the can't connect to server error. Strange as I've done this many times before but because the duplicating issue I've always just deleted the account. I was hoping to try this 'new' method but as I said it couldn't connect to the server. I had all the correct settings!
Oh well... since you said it doesn't work, not sure I will bother. When you said you deleted 'On My Mac' account...did you actually go into the preference pane and select the Remove Account option? with the minus symbol? Not sure why doing that would remove from the iCloud too.
yeh. i selected all the contacts on my mac and deleted them the first time. just tried to delete 'on my mac' account in preferences. the result is still messy, everything still duplicated. IMO, im gonna leave address syncing till 10.6.9. ical syncing is good enough for me atm.
cheers mate