SPARQL answers with wrong dataformat

[white-gecko]

SPARQL answers with wrong dataformat.

Import this Resource into a virtuoso backed OntoWiki:

<http://localhost/activity/1/> a aair:Activity ;
    aair:activityActor <http://comiles.eu/natanael.rdf#me> ;
    ns3:published "2012-01-01T00:00:01+02:00"^^xsd:dateTime ;
    aair:activityVerb aair:Post ;
    aair:activityObject <http://localhost/object/1/> .

Do following query with the QueryEditor and with the Virtuoso Conductor

PREFIX atom: <http://www.w3.org/2005/Atom/>
PREFIX aair: <http://xmlns.notu.be/aair#>
SELECT ?activity ?date ?verb ?object
WHERE {
    ?activity a aair:Activity ;
              aair:activityActor  <http://comiles.eu/natanael.rdf#me> ;
              atom:published      ?date ;
              aair:activityVerb   ?verb ;
              aair:activityObject ?object .
}

correct answer by Virtuoso and OW with ZendDB

activity: http://localhost/1/
date: 2012-01-01T00:00:01+02:00
verb: http://xmlns.notu.be/aair#Post
object: http://localhost/object/1/

wrong answer by OW with Virtuoso

activity: http://localhost/1/
date: 2012-01-01 00:00:01
verb: http://xmlns.notu.be/aair#Post
object: http://localhost/object/1/

As you can see the date format is converted before the query result is returned.

Same with $model->sparqlQuery($query).