query where distinct and minus have no effect

[Tim Harsch]

Hi,
Using the LUBM0 dataset I tried the following query in Fuseki-0.1.0.

PREFIX ub:    <http://www.lehigh.edu/~zhp2/2004/0401/univ-bench.owl#>
SELECT DISTINCT *
 WHERE { 
  ?n0 ub:teacherOf ?n1.
  MINUS { <http://www.Department0.University0.edu/AssistantProfessor0> 
ub:teacherOf <http://www.Department0.University0.edu/Course38> }
} ORDER BY ?n0 ?n1

The first three results are below.  Notice the first result contains 
AssistantProfessor0, Course38 (violating the MINUS) and the next two results 
are 
redundant (shouldn't happen with DISTINCT).  Any ideas?  The NT file can be 
found in this Zip archive I packed up for other reasons ( http://bit.ly/k8adNJ 
).


    <result>
      <binding name="n0">
        http://www.Department0.University0.edu/AssistantProfessor0
      </binding>
      <binding name="n1">
        http://www.Department0.University0.edu/Course38
      </binding>
    </result>
    <result>
      <binding name="n0">
        http://www.Department0.University0.edu/AssistantProfessor0
      </binding>
      <binding name="n1">
        http://www.Department0.University0.edu/Course39
      </binding>
    </result>
    <result>
      <binding name="n0">
        http://www.Department0.University0.edu/AssistantProfessor0
      </binding>
      <binding name="n1">
        http://www.Department0.University0.edu/GraduateCourse39
      </binding>
    </result>