screensaver not kicking in?

[Jonathan Kamens <jik kamens brookline ma us>]

Usually I lock my screen with ctrl-alt-L before I walk away from my 
computer.  Last night I didn't, and when I came back in the morning it 
wasn't locked.

I just checked my screensaver preferences and they are (still, as 
expected) configured to lock the screen automatically if I'm idle for 
five minutes.  For some reason this did not work.

Is anybody else seeing this?

I'm running with a recent rawhide update.

  jik