As I hinted earlier, I've now totally rewritten the way date headers are
  customised.  You can now have as many Date headers as you like.

This isn't clearly a bug, but I think it is.  In the "ago"  display,
seconds are omitted if 0.  This results in something like

Date: Sun, 30 Jan 2011 17:56:53 -0800 (11 hours, 49 minutes, 59 seconds ago)
Date: Sun, 30 Jan 2011 17:56:53 -0800 (11 hours, 50 minutes ago)
Date: Sun, 30 Jan 2011 17:56:53 -0800 (11 hours, 50 minutes, 1 second ago)

I find the seconds coming and going to be distracting.   Plus I wonder
if the minutes would go away as well when 0.


I have no problem omitting leading hours/days/minutes as zero, and
omitting seconds because there is a day, etc.   I am only objecting to
suppressing fields because they are zero.