Cursor on wrong place while editing shapekeys

Working on a model i wanted to improve it by using shapekeys for different bone angles. I set up the drivers and anything works fine. But if im editing the shapes at the desired pose the 3D-manipulator isn’t at the right place. It is somewhere else. See screenshot and corresponding blendfile below.

Download Link for .blend

Is this a bug in 2.5.6 or do i have to activate some option that this is corrected according to the current transformations?