Example:

Show an orgchart. Perform a zoom
Perform a orgchart.init() with the new data.

New behavior: if you perform now a zoom, the zoom will be in much larger steps (as some variables are not reset).

Expected behavior: normal zoom.

(I will submit a solution for this in a moment). (solution consists of performing an unbind as first step in the bind (I suggest to do this both for pan and zoom).