Hi Michael

Today I added mac trackpad gestures support to Nodeeditor (http://moi3d.com/forum/index.php?webtag=MOI&msg=7713.805)
It works good, but I noticed several issues with trackpad events.

1.
Run MoI (v4 Feb-9 Mac)
Open Nodeeditor window
Place mouse cursor over NE window
Try to use two-finger scroll
(issue) sometimes MoI fires a mousewheel event instead of trackpad scroll event (zooming instead of scrolling)

I noticed the same issue with MoI viewports.
Run MoI
Open any window (Help -> About MoI for example)
Place mouse cursor over any viewport
Try to use two-finger scroll
You will get the same problem with zooming
Click on viewport, then click on About window. Repeat it several times.
The issue will gone.

2.
Open Nodeeditor window
Click on any viewport window (NE window became inactive)
Place mouse cursor over NE window
Try to use trackpad gestures.
(issue) Scroll works good (MoI properly fires a trackpadgesture event) , Zoom and SmartZoom doesn't work at all.