I recently put facebook 1.5 on my BB - which then duplicated everyones birthdays in my calendar. So - I deleted out the duplicates(leaving the facebook notifcations) ..but then when I sync'd it to outlook - outlook didn't take any of the facebook calendar notifications.
my main annoyance though - is when i look at a contact in the address book and i click "show on google maps" it names the company that the person works for(if there's one listed) kind of stupid..