What is that, please?

Can anybody tell, what all the default backup tool saves?

Among other, there are these files:
contacts.zip - however, I have not found any contact in it, there are just portrait pictures!
messaging.zip - similarly here, there are no SMSs, just a few MMSs and attached photos, from what I can tell.

So is it all in the organizer.zip? The contacts, messages, calendar? Does anybody know?