ECMA International TC46 has updated the XML Paper Specification documents to working draft version 1.1. The new drafts can be found here as PDF or XPS and the changes can be found here (only as PDF :-) in the issue list.
It seems like there are no major changes, mostly minor and editorial changes.
I think we can expect some more changes when Office Open Xml has gone through the last steps of the ISO Fast-Track procedure, especially the references to the OPC.
Thanks to Adrian Ford for giving us some updates.