This is an old one, but I've just been working out the answers to a few of these questions myself so I thought I'd add them here. I'll answer your three questions separately.
- The first marker index in the bundle
XML file can be any marker on you
object, it can but doesn't have to
be marker zero. The other marker
indices must correspond their the
appropriate marker number used.
- Status was a bit of mystery until I
dug into the source code, it seems
there is some support for extra
corner features on the objects as
well the marker tags but I haven't
attempted to get this working yet.
From experimentation we've had it
working fine with a status of 1 or 2.
- I can't help you with this one I'm afraid, we've not experienced
this error on our setup.