You'd originally sent this just to me since I have my reply to address
set, but I ran into it and other's may have too..
  Just leave a window for the project slightly out of the main window,
so there will be a scroll bar, either horizontal or vertical.  As long
as there's a scroll bar, it won't jump all over like that, just scroll a
little.  I leave the edge of one window slightly off the right side,
even a horizontal sb will keep the main window from jumping around
vertically.

  This along with turning off universal scrolling for MPLab and setting
the MPLab Environment intellimouse setting to scroll one page, makes the
wheel work like it seems it should..

Quentin wrote:
>
> I've got another problem:
> If my pointer happens to be outside any MPLAB window (That is, on the
> MPLAB background) and I just touch my scroll wheel, all my windows
> scroll of the screen, and I sit with a blank MPLAB screen.
> It takes me a few scrolls with the wheel just to get the windows back
> again.
>
> Anybody else have this?
> I use a A4tech 4D trackball (I hate the thing actually, bad design).
>
> Quentin