We've just installed the Tech preview.
The Mobility/ActiveSync connector is working perfectly for All data when connecting to a Windows Mobile Phone.

However, on my HTC Hero running Android, for the same test user, Contacts and Calender are syncing perfectly, but Mail reports a strange error "An integer column does not contain an integer". No mail is syunc.

Does anyone have any idea how to fix this? Or more importantly, where should I be looking for logs on what is really going on so I can report bugs, if this one.