Question on FreeDoc and unref

I have an app that creates several xml docs, and it seems to be leaking
memory some place (I got sporadic memory errors -- GPF). I was using
gdome_di_freeDoc to release the xml doc, but I've noticed it is marked as
deprecated in the documentation... What is the right way to release the
memoty ? Is it enough to do a gdome_di_unref on the dom implementation
object ?

Any help is welcome.
Thanks a lot,

Alex