This is an X11-only release. No new display modes this time, but I ported xscreensaver-settings from GTK 2 to GTK 3.
"Ported" is doing some heavy lifting there, since if you have even a passing familiarity with open source software you can easily predict that "port" means "largely rewrite".
It wasn't quite as ridiculous as the shit that Apple pulled between macOS and iOS, doing things like replacing NSColor with identical-yet-not UIColor, but it was close. No Linux developer has ever met a function that they don't believe should be deprecated after 5 years. They're like the pedobear of APIs: "Too old!"
Anyway, lemme know if it breaks.
Minor update: if you already downloaded 6.05.tar.gz, grab 6.05.1.tar.gz. Oops.