Screen lock stopped working

[David Rosenstrauch <darose@xxxxxxxxxx>]

I've noticed that my screen lock / screensaver has stopped engaging as 
of a couple of days ago.  I check the settings (which I haven't changed 
recently), but they seem to be set correctly.

Anyone have an idea what package upgrade might have caused this and/or 
which bugs I should watch for a resolution?

I'm running XFCE desktop btw.

Thanks,

DR