When run in day-step mode, the clocktable header line for each day's 
table contains an active timestamp.  I figure it should be an inactive 
timestamp, since otherwise I get a junk entry in the agenda each day 
(whatever heading was previous to the clocktable).

I'm talking about the output from a spec such as the following:

#+BEGIN: clocktable :block thisweek :step day

Only two lines changed (1079 & 1082 of org-clock.el).  Barely worthy of 
a formal patch, but I have one attached.

Adam