object pivot tool scales scaled objects

I almost went crazy, before I found out what was causing the problem (because it seemed the object just disappered). So after scaling an object and trying to move its pivot position, the object pivot tool will scale the object with every move you make, regardless of whether you manipulate position or rotation! If the object was scaled down, the object pivot tool will scale it even further down. If it was scaled up, the object will explode to new dimensions.
Needles to say, that this shouldn't happen.
I just tested the same scenario in Maya, where there were no problems. When scaling again, the new pivot point is used as reference point/center.

Fixed.