I just got a new laptop (oh frabjuous day!) to replace my 4-year-old antique, which was on its last legs. It's a very slick Asus model and so far I'm very happy with it, but while creating a recovery DVD, I encountered a very interesting usage of predictably to mean "it is predicted that": "Predictably, four blank writable DVDs are needed to create the recovery DVD." When I first saw this, I did a double-take, since as a sentence adverb, I take "predictably" to mean "as could be/have been predicted." It sounded like the computer was expressing frustration: I should have known! This is likely an ESL error, unless there's some shift in the meaning of -ably adverbs that hasn't yet come to my attention.