The following regards parabolic zoom. Set zooming speed to slowest for easier reproducing of the issue.
If you move the mouse pointer over an icon the initial parabolic zoom starts. Move the pointer to the left or right while the zooming is in progress. When zooming is finished you will notice that the parabolic curve "jumps" to your mouse pointer. On a Mac this is not the case. After the initial zoom the symbols move very smooth to the location of the pointer.