Hello,
Am using Emacs under Windows XP (see below) and org mode version 6.05b.

I get the message in the subject when I click on a time stamp which seems perfectly OK. As a test I took the following .org file

** TODO <1973-07-28 Sat +1y> 1
** TODO <1908-07-06 Mon +1y> 2 *
** TODO <1912-04-26 Fri +1y> 3  *
** TODO <1943-01-16 Sat +1y> 4  *
** TODO <1979-04-11 Wed +1y> 5
** TODO <1970-06-11 Thu +1y> 6
** TODO <1976-08-07 Sat +1y> 7
** TODO <1941-06-19 Thu +1y> 8 *
** TODO <1920-08-20 Fri +1y> 9  *
** TODO <1994-08-24 Wed +1y> 10
** TODO <2005-09-03 Sat +1y> 11
** TODO <1965-11-10 Wed +1y> 12  *
** TODO <1987-11-21 Sat +1y> 13
** TODO <2007-06-15 Fri +1y> 14
** TODO <2001-05-19 Sat +1y> 15

a right mouse click on a day stamp should produce a "day agenda".
However, all timestamps on lines ending with an asterisk produce
the stated message. The Linux version of Emacs does not exhibit 
this behavior.

Any advice would be appreciated.

Regards,
bostjanv

In GNU Emacs 22.2.1 (i386-mingw-nt5.1.2600)
 of 2008-03-26 on RELEASE
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4)'

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: ENU
  locale-coding-system: cp1250
  default-enable-multibyte-characters: t

Major mode: Org

Minor modes in effect:
  encoded-kbd-mode: t
  tooltip-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t

Recent input:
<backspace> <backspace> 2 <down-mouse-1> <mouse-1> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> 3 <down-mouse-1> 
<mouse-1> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> 4 <down-mouse-1> 
<mouse-1> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> 5 <down-mouse-1> 
<mouse-1> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
6 <down-mouse-1> <mouse-1> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> 7 <down-mouse-1> <mouse-1> <help-echo> 
<help-echo> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> 8 <down-mouse-1> <mouse-1> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> 9 <down-mouse-1> <mouse-1> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> 1 0 <down-mouse-1> <mouse-1> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> 1 1 <down-mouse-1> <mouse-1> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
1 2 <down-mouse-1> <mouse-1> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> 1 3 <down-mouse-1> <mouse-1> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> 1 4 <down-mouse-1> <mouse-1> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> 1 5 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<tool-bar> <save-buffer> <help-echo> <down-mouse-1> 
<mouse-2> <down-mouse-1> <mouse-2> <down-mouse-1> <mouse-2> 
<down-mouse-1> <mouse-2> <down-mouse-1> <mouse-2> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <menu-bar> <help-menu> <send-emacs-bug
-report>

Recent messages:
org-timestamp-change: Specified time is not representable
CHILDREN
apply: Specified time is not representable
org-timestamp-change: Specified time is not representable
OVERVIEW
apply: Specified time is not representable
Auto-saving...done
Wrote c:/Documents and Settings/Bostjan/My Documents/.emacs.d/notes.org
apply: Specified time is not representable [3 times]
Loading emacsbug...done