<p>I'm using a the TreeView control and it scrolls automatically to left-align TreeViewItem when one of them is clicked.  I've gone looking at my Styles and ControlTemplates, but I haven't found anything.  Is there a default ControlTemplate that causes this? I want to disable it.</p>

It looks like I found a good clue on
MSDN
:
Sounds like this is an interaction
  with the scrollviewer and the focus
  system.
When an element is focused within a
  ScrollViewer (which is part of the
  TreeView template), the ScrollViewer
  is instructed to make the element
  visible. It automatically responds by
  scrolling to the requested element.
The methods inside of ScrollViewer
  that handle these focus requests are
  all private and / or internal so you
  really can't get to them. I don't
  think there's too much you can do in
  this case; it's just how focus works.
So, is that it? Surely there's a way to modify the TreeView template so that the ScrollViewer won't have this behavior...