Version 7.5 r8763 (affects all devices, I suspect, not just radio).
Under the new 7.5.0 release, if you set the "when stopped" screensaver to none, a clock screensaver will still appear. 

I marked this as critical because "none" is the default for "when stopped" on radio, so the default behavior for radio has essentially changed and users can't change it back.

Below is a suggested fix, basically revert the old "skip ss code" and move the time check code later.

Current:
	if not screensaver or not screensaver.applet or
		( tonumber(year) < 2009 and not force and self:_getMode() == 'whenOff' ) then -- fallback to blank screensaver on whenOff and no clock
		-- no screensaver, fallback to default
		log:warn('The configured screensaver method ', the_screensaver, ' is not available. Falling back to default from Meta file')
		local fallbackKey = self.defaultSettings[self:_getMode()]
		screensaver = self.screensavers[fallbackKey]
	--	return
	end


Suggested fix:

	--The "none" choice give false:false, for that case, just return
	if not screensaver or not screensaver.applet then
		-- no screensaver, do nothing
		return
	end

	if ( tonumber(year) < 2009 and not force and self:_getMode() == 'whenOff' ) then -- fallback to blank screensaver on whenOff and no clock
		log:warn('The configured screensaver method ', the_screensaver, ' is not available. Falling back to default from Meta file')
		local fallbackKey = self.defaultSettings[self:_getMode()]
		screensaver = self.screensavers[fallbackKey]
	--	return
	end