In the demo store the search form uses POST as method instead of GET. If the method is changed to GET, the search functionality doesn't work anymore.
It is more appropriate to use the GET method [http://www.w3.org/2001/tag/doc/whenToUseGet.html#checklist according to W3C].
[http://groups.google.com/group/satchmo-users/browse_thread/thread/3db9e2b84e453c30 Google Groups thread about the subject.]
Reported by lgespee