Hi! I'm posting here to avoid creating another topic on this matter.
Just started using the beta, it's awesome and really fast (zooming on some documents here was way faster than expected), but I'm not getting any highlighting on the tools and persona buttons on the toolbars, as on the screenshot I'm sending.
I didn't change any gamma preference on the UI, this is how it worked right from the start. Since the persona buttons have a slight color change when selected it's kinda visible, but the tools have no highlight. :P
Closing/opening/rebooting didn't solve it, I'm on Win10 Pro, btw. :)