xf96-video-intel textured video output is a mess

[Barry Scott]

I running with the git version of the intel driver and when xine plays 
an MPEG2 movie
I get this output on the screen: 
http://www.onelan.co.uk/xorg-tmp/screen_snap_shot.png

Apart from the obvious poor image the XV code is drawing outside of the 
window,
the purple area on the right hand side.

This breaks for i945 and i965. I'm using xine 1.1.1 with some patches.
This xine code has been working on Unichrome driver and the
git version of the intel driver from modesetting branch on 26-Sep-2006.

How can I help debug this?

Barry