I do have the problem in withdrawl. it is wierd, since it happened to me for the first time that the site said withdrawl is compeleted but don't shown in blockchain or i dont receive it. However, I have filed a suppourt ticket by mailing them. I am very faithful that Bitfinex will take good care of this problem as they have done in the past proving the reputation.

Just wait and have my finger crossed.

PS: i thought i was the only one who experiencing such missing withdraw.