Total omniscience is a logical deathtrap for the Christian god.
As HAL has pointed out, if Yahweh has total omniscience then the freewill he supposedly created was a lie. Not to mention he's a sociopathic ass for all the pointless pain and suffering.
If, however, you want to say God has a limited omniscience, per himself, and cannot see the future, well then you've got ground to stand on, Jst. However, a limited omniscience does take away some of God's revelatory prowess, and many Christians won't allow that because their God can "do all things" and whatnot.