I agree about the labels, they could at least have normal translations above/below. will ask the other qs devs when we are prepping the next release.
Fifth, thanks for the screenshot.
I checked winquake at default settings ( surprised how weird it feels that the gun swings when you look up/down), and you can see the top half of the end of the barrels:
http://imgur.com/lx6DV1F
I'm not sure of the history of it but QS is the same as Fitz 085 I think, except with compensation for 19:9 resolution. I'm sure baker and others have researched and written about the topic so i'll look into it sometime.
Also, if the music volume slider doesn't work, the only explanation I know of is it's playing CD audio - do you have the soundtrack CD inserted/mounted as a virtual drive? The CD support in QS might lack volume control, I never really used it. There is a "-nocdaudio" command line option to disable CD support entirely, or use the -sdl2.exe builds which lack CD support iirc.