Donald, did you find a solution for the problem? I'm struggling with the 
same behaviour (only difference is that I use Rust bindings for gtk3).

Am Mittwoch, 16. September 2015 19:05:43 UTC+2 schrieb Donald Allen:
>>>
>>> I have written a personal finance manager (which I call Newcash and 
>>> which I will be releasing on github as soon as I finish the documentation). 
>>> It is gtk+3-based and makes use of gtk's treeview to display the tree of 
>>> accounts. This display normally has little arrows to the left of expandable 
>>> accounts (those accounts in the tree with children). It works correctly on 
>>> Arch Linux, Linux Mint, OpenBSD, FreeBSD and I may have forgotten something 
>>> on which I've tested it. The arrows are missing when I run the application 
>>> on a newly installed Void system. Clicking in the area of the missing 
>>> arrows does expand the account, so that functionality works, but the lack 
>>> of the display of those little icons is unacceptable. I suspect it's due to 
>>> the font chosen by default, but that's pure speculation on my part. And 
>>> anticipating a question, yes, I did completely rebuild my application 
>>> having installed Void's gtk+3 and gtk+3-devel packages.
>>>
>>> I really like some of the ideas behind void (particularly the non-use of 
>>> systemd), but it feels like it's not quite ready for prime time. I realize 
>>> that putting a Linux distribution together is a huge amount of work 
>>> involving a gazillion details and so I'm not surprised that Void feels as 
>>> if it's not quite there yet, given its relative youth. 
>>>
>>