Are you sure this "jump" you are experiencing isn't being provoked by the flickering of margin collapse caused by the inline styles(overflow:hidden; padding-top: etc..) jquery injects on the element being animated?
In which case the more elegant solution would be to remedy your css.
Are you sure this "jump" you are experiencing isn't being provoked by the flickering of margin collapse caused by the inline styles(overflow:hidden; padding-top: etc..) jquery injects on the element being animated?
In which case the more elegant solution would be to remedy your css.