Xerces and XML 1.1

Under JDK 1.5.0_06, I've called 

    SAXParserFactory.newInstance().newSAXParser().getXMLReader()

to get a SAX parser, and it's returned me an instance of 

    com.sun.org.apache.xerces.internal.parsers.SAXParser

When I do

    parser.getFeature("http://xml.org/sax/features/xml-1.1")

the result is true.

But the parser then throws this error message:

    XML version "1.1" is not supported, only XML 1.0 is supported.

The odd thing is, in another application I think I'm creating a parser in
exactly the same way and it seems to work.

Any ideas?

Michael Kay