i810 rotate memory range off?

[Thomas Glanzmann]

Hello again Alan,
I still have a problem with some artefacts on my screen. They are quiet
reproducable as soon as I switch folder in mutt for example or edit a
text in vim they pop up. I was able to make a screenshot of them. This
happens with CVS HEAD and GIT HEAD of the intel driver run in 'xrandr
-o left' mode (once counter-clockwise rotated). I can get rid of this
artefacts using redraw or press ctrl-l in my xterm. Maybe you have an
idea how to fix that. Everything else seems perfect.

Artefacts:

http://wwwcip.informatik.uni-erlangen.de/~sithglan/shot.png

In the upper left you can see a few one pixel wide short blue dotted
lines. This is a screenshot of my xterm running in fullscreen mode (you
can tell that I am in mutt from the mutt status bar and my screen status
bar (if you scroll down a lot). My display resolution is 1200x1600.

        Thomas