Issues still exist with facebook syncing.
Example. I dl facebook for android from market clean. When setting it up...it doesnt even ask if I would like to sync with contacts..all..or no sync. Its also not an option in settings within the facebook app.
So...I go to accounts and sync...I click on add account...I click on fb account....it sends me directly back to the accounts and sync front page....will not allow me to add fb account at all.
Problems will probably still exist with contacts that have been sync'd (if you got your fb account to sync in the first place before installing v4)
Yup, everything is working fine for me coming from 3.3 except Facebook Sync.