I started receiving bug reports from my Windows users at the end of last week about the latest desktop client. i couldn’t reproduce their problem, but I got the same update (on Mac) over the weekend and now I see what it is.
The drag bar at the top of the client, where the server selection dropdown and the open channel tabs are, is always a bone white colour regardless of the theme chosen. This really needs to be set to a colour that matches whatever the theme is. The users who are choosing dark themes find it annoying and distracting, and it really does look like a bug… even if it is working as intended… it seems like (at best) a poor design choice.