Xquery does not return any results on 10.2.0.4, does work on 10.2.0.5

Question

I have a Xquery statement that works as expected on Oracle 10.2.0.5 but does not return any results on Oracle 10.2.0.4.
Is this the result of a badly written query? A bug in 10.2.0.4?
Is there a way to rewrite the query so that is does work on 10.2.0.4?
Testcode:
declare
   l_xml xmltype;
   -- Select layers with TileMatrixSet EPSG:28992
   cursor c_layer(p_xml xmltype) is
      select t.*
        from xmltable(xmlnamespaces(default 'http://www.opengis.net/wmts/1.0'
                                   ,'http://www.opengis.net/ows/1.1' as "ows"
                                    ,'http://schemas.opengis.net/gml' as "gml"
                                    ,'http://www.w3.org/1999/xlink' as "xlink"
                                    ,'http://www.w3.org/2001/XMLSchema-instance' as "xsi")
                      ,'for $d in //Layer[TileMatrixSetLink/TileMatrixSet="EPSG:28992"] return $d' passing
                      p_xml columns title varchar2(100) path 'ows:Title'
                      ,format varchar2(100) path 'Format'
                      ,style xmltype path 'Style') as t;
begin
   l_xml := xmltype.createxml('<?xml version="1.0" encoding="UTF-8"?>
<Capabilities xmlns="http://www.opengis.net/wmts/1.0"
xmlns:ows="http://www.opengis.net/ows/1.1"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:gml="http://www.opengis.net/gml" xsi:schemaLocation="http://www.opengis.net/wmts/1.0 http://schemas.opengis.net/wmts/1.0/wmtsGetCapabilities_response.xsd"
version="1.0.0">
<Contents>
  <Layer>
    <ows:Title>brtachtergrondkaart</ows:Title>
    <ows:Identifier>brtachtergrondkaart</ows:Identifier>
    <Style isDefault="true">
      <ows:Identifier>_null</ows:Identifier>
    </Style>
    <Format>image/png8</Format>
    <TileMatrixSetLink>      <TileMatrixSet>EPSG:28992</TileMatrixSet>
    </TileMatrixSetLink>  </Layer>
  <Layer>
    <ows:Title>top10nl</ows:Title>
    <ows:Identifier>top10nl</ows:Identifier>
    <Style isDefault="true">
      <ows:Identifier>_null</ows:Identifier>
    </Style>
    <Format>image/png8</Format>
    <TileMatrixSetLink>      <TileMatrixSet>EPSG:28992</TileMatrixSet>
    </TileMatrixSetLink>  </Layer>
  <Layer>
    <ows:Title>bgt</ows:Title>
    <ows:Identifier>bgt</ows:Identifier>
    <Style isDefault="true">
      <ows:Identifier>_null</ows:Identifier>
    </Style>
    <Format>image/png8</Format>
    <TileMatrixSetLink>      <TileMatrixSet>EPSG:28992</TileMatrixSet>
    </TileMatrixSetLink>  </Layer>
</Contents>
</Capabilities>');
   for r_layer in c_layer(l_xml)
   loop
      dbms_output.put_line(r_layer.title);
   end loop;
end;Result on 10.2.0.5:
brtachtergrondkaart
top10nl
bgt

Answer 1

This one's strange indeed.
I can reproduce on 10.2.0.4 and one of the following seems to fix it :
1) Specifying the column list in the SELECT, instead of t.* :
   -- Select layers with TileMatrixSet EPSG:28992
   cursor c_layer(p_xml xmltype) is
      select t.title, t.format, t.style
        from xmltable(or,
2) Using an extended FLWOR expression :
for $d in //Layer
where $d/TileMatrixSetLink/TileMatrixSet = "EPSG:28992"
return $dMaybe you've already noticed but the problem only occurs within a PL/SQL context.
The same query run from SQL is OK.