Comment 38 for bug 728643

Now that scroll coasting is on by default, I’ve noticed that it has a funny interaction with modifier keys. If I flick and release my fingers to initiate coasting, then I press Ctrl afterwards while my document is still scrolling, it immediately starts zooming instead.

Probably the right solution is for any input activity (not just any touchpad activity) to halt the coasting operation in progress.

I’m using xserver-xorg-input-synaptics 1.3.99+git20110116.0e27ce3a-0ubuntu3 in Ubuntu natty.