Too frequently these days are goalkeepers succumbing to the natural curl of your standard in-step free kick.
For the most part, there is a lack of imagination on the part of the team taking the free kick, so the viewer can easily discern what side of the goal the ball will be curling into based on which foot is being used.
So, goalkeepers assemble their wall and then stand on the side of the goal opposite to where the ball will finish, I don't know whether this is because the goalkeeper's view is initially obstructed by the wall, or if they're relying on the wall to block any shots falling to that side of the goal, but today, Abbiati added to the list of goalkeepers that have been made to look foolish by the obvious.
Whether the solution is to devote fewer men to the wall so that a clearer view is gained, or the goalkeeper taking the responsibility to guard the goal-side that walls are currently protecting remains to be seen. However, with Milan appearing shaky in-game, as well as giving away a fairly high number of free-kicks, they can't afford another means for teams to score from.