Generating a new transformer

[Netta]

When switching to jre 1.4.2 I have a problem to generate a new transformer using:

TransformerFactory transformerFactory =

javax.xml.transform.TransformerFactory.newInstance();

Source xsl = new StreamSource(...);

transformerFactory.newTransformer(xsl);

The exception thrown is ConfigurationTransformerExcpetion: A location step was expected following the '/' or '//' token.

This exception does not occur in earlier JDKs and in any case it occurs only for part of my XSL files.

Is there a change in the XSL format that causes this exception?