I changed the main menu background look for this series, and it broke the brightness slider (you'd still get blindingly bright white boarders ingame, even if you put the brightness slider to 0%).
This is now fixed!
V1.0.5 - Fixed brightness not applying to ingame canvas boarder
Source: Steam Community (opens in a new tab)
Build and release context
Steam update times within 24 hours of this post. Matching dates do not confirm which build it describes.
Build 10553197 · public branch
Steam updated · First observed