I'm on Ubuntu 15.10 dev (SciTE is compiled for GTK+ 3.12.2 and GTK+ 3.16.6 is in...
Scrolling with the mouse wheel on the horizontal scrollbar causes both scrollbars to scroll
Right border of a tab targets the next tab
I'm not able to reproduce this issue anymore while still on SciTE 3.5.0. Maybe this...
Not all changed options are immediately applied
Edit: I'm noticing this only on the horizontal scrollbar.
Storing the scroll position per buffer
Is the commit in version 3.5.0? As I'm still able to reproduce this issue there.