3.0.4 Dark mode problems - pls ignore unless future info
OS: macOS Mojave (10.14), Arch.: x86_64, MuseScore version (64-bit): 3.0.4.21117, revision: cda4080
I don't know what's going on here -- restarting the app fixed it. I was developing another app in XCode vis-a-vis dark mode problems, and it affected the system somehow. Please ignore pending further info.