Xscreensaver is issuing a warning on startup:
"This version of XScreenSaver is very old! Please upgrade."
Current version is 5.44.
Latest release is 6.02.
*** This bug has been marked as a duplicate of bug 254178 ***
Very weird. First time I searched bugzilla for "xscreensaver", only closed PRs turned up. Just tried again and now I see 254178.