[Orgmode] clocktable and ISO week

[David Bremner]

I have a clocktable that begins like this.

#+BEGIN: clocktable :maxlevel 2 :block 2009-W05 :scope agenda-with-archives
Clock summary at [2009-01-27 Tue 17:15], for week 2009-W04.

[contents snipped]

#+END:

Whatever week I put in :block, it puts one less in the title.
It seems actually gather the clock data from the right week, but the
title is wrong?  Or I misunderstand something as usual :-).

I tried emacs22 and emacs23 (emacs-snapshot on debian) and org-mode
6.19b (6.17c was the same IIRC).

d