Sound/vibrate is not working for me either. Several of the pictures and/or "home page" facebook links were incorrect either. It really really bothers me that it finds people based on phone number even if you don't have that contact as a friend. I don't want people getting my facebook link just because they have my phone number. Granted, they still need to ask for a friend request... but still, it seems so intrusive. Facebook should only provide sync information for contacts that are currently your friends in Facebook. Also, many people are reporting having their contact's photos replaced during a sync even when they have that option selected as OFF. epic fail.
I feel like this long awaited update was rushed and released way too soon. There are too many bugs. Terrible release. Terrible.
Oh, and I also hate that when syncing contacts it adds facebook links as a "home page". Um... Facebook isn't a home page. It should create a custom label that says "facebook". I went through my contacts and changed them all. And if you already have a "home page" for a contact, facebook sync just doesn't add the link at all. It's so weird.
Like I said... terrible update.