this bug was reported to the list here by maht
	http://9fans.net/archive/2009/03/143
andrey wrote some good test cases and got close
to a fix
	http://9fans.net/archive/2009/03/145  (simle test case)
	http://9fans.net/archive/2009/03/164  (all test cases)
	http://9fans.net/archive/2009/03/183
and russ posted his fix to p9p here
	http://9fans.net/archive/2009/03/198