The zoom in the commander's position is a bug. I have the same problem. The [] keys don't work. It is like a two position zoom with no transition.
The strange thing is it only happens in Mode 2. I made a Mode 4 for gv-ing and the zoom works correctly in the Commander's position.
While the zoom isn't as great as it used to be, it still works the way it used to in the Commander's position as long as it isn't in Mode 2.
wrongway