Hi Michael, does it do panning instead? The new beta interprets trackpad "scroll" messages (normally done by 2 finger drag on the trackpad) to be used for panning instead of zooming, and that same thing is probably kicking in for you here.

If it doesn't actually do panning, then it will probably be easy for me to fix, I probably just need to look if it is only a "one finger touching" pan and allow that to be processed as it used to.

- Michael