Xf86-input-synaptics 1.5.0-1 = 1.5.99-0.2 No „afterscroll"

Question

After upgrade of package xf86-input-synaptics from 1.5.0-1 to 1.5.99-0.2 on x86_64 my synaptics touchpad lost ability to do Coasting*.
* I guess that's how ability to do scroll drift called. You start scrolling quickly and release touchpad. After release scrolling still goes on.
ADDITIONAL INFO:
* I see a lot of
![1331675832,000,xklavier_evt_xkb.c:xkl_xkb_process_x_event/] ATTENTION! Currently cached group 0 is not equal to the current group from the event: 1
in my .xsession-errors
* Fiddling with synaptic options didn't resulted in any desirable result.
* Downgrading to previous 1.5.0-1 version makes cursor to not even budge. I mean it just doesn't move.
* I'm not very sure that exactly xf86-input-synaptics is to blame. There was bunch of other xorg-* and xf86-* packages upgraded too.
* I still see some effects that shows that Coasting actually works, but just not, like expected. Current behaviour is:
When you scroll quickly and release touchbar scrolling stops. After ~0.5 second it scrolls by 1 scroll step in direction it should drift/coast to.

Answer 1

I experienced the same using [testing] earlier, cross thread for reference: https://bbs.archlinux.org/viewtopic.php?id=136743
If you say this used to work alright, this might be worth a ticket on flyspray: https://bugs.archlinux.org/