http://bugs.winehq.org/show_bug.cgi?id=11826
--- Comment #8 from Zak Mayer zak.mayer@gmail.com 2008-03-04 21:31:00 --- Addendum - the white minimap only happens when 'indoors' in game.
At this time what happens with the minimap is a zoom/transition on the minimap and it goes to white. As soon as you move the avatar outdoors the minimap comes back.
@Roderick Using the GIT is way beyond my technical expertise at this time as well as overall comfort level with Wine.