Hi Sarah,
Yes, sorry about the uninformed postings.

I feel a sense of responsibility for making a mess of your
thread.
Have you read the
API doc entry for JAXBContext and the newInstance() method? There are a couple of references in there to
jaxb.properties and the
javax.xml.bind.context.factory property that might be the root of your problem.
Hope that goes some way towards making amends.
Jules