Dear SC,
As on the next day is a public holiday, I would not mind if the call is being canceled.
The only update from my side at the moment is that I am working on ODF test documents for the Google Summer of Code project on LibreOffice, where a student is going to start on a change-tracking prototype.
To summarize it is still hard to believe that there is no information on format changes - not even hard formatting - within the existing ODF.
Some might think as there are elements of format change <text:format-change>, but a look into the document or in the specification reveals there is no additional information on the type of format change, see:
Regards,
Svante