[Orgmode] Problem searching CLOSED and DEADLINE properties

[Bart Parliman]

When the example file below is added to the agenda file list, and 
I perform an agenda property search (C-c C-a m), I can't seem to 
locate any CLOSED items if I use the date matching format, for 
example these don't work...

CLOSED>="<2009-01-01>"
CLOSED="<2009-01-07>"

... but a regexp search like this...

CLOSED={2009}

... works fine.  For DEADLINE, an exact date matches fails...

DEADLINE="<2009-01-28>"

... but an inequality match succeeds...

DEADLINE>="<2009-01-28>"

FWIW I'm using version 6.17b.  Am I just using this format 
incorrectly?

Thanks,
Bart

-------- file start --------
#+SEQ_TODO: NEXT WAITING | DONE
#+STARTUP: overview

* DONE Test1
  CLOSED: [2009-01-07 Wed 12:26]

* NEXT Test2
  DEADLINE: <2009-01-28 Wed>

* Test3

--------  file end  --------