Thanks - I can reproduce this with packages based on 3.0.3.1 which I'm working on (not yet uploaded).
On Sat, Jul 22, 2017 at 11:05:09PM +0100, D Haley wrote: > I'm unsure if this is an upstream bug or not. I'd imagine it is - we aren't patching anything in this area. Testing with upstream git master using GTK3, the line patterns look right there. So this may be fixed upstream but need backporting (or have been backported since 3.0.3.1). Or it may be a GTK2 vs GTK3 bug - I'll try to narrow it down later. Cheers, Olly