I have recently upgraded Office XP to Office 2003 and immediately started
having trouble with the scroll function on my mouse in Excel (MS intellimouse
explorer).

After a short time in Excel, maybe 10 minutes, the scroll function changes
from vertical scrolling to horizontal scrolling and nothing I can do will
switch it back.

Restarting Excel works but that is obviously not an acceptable fix, I
upgraded to a newer Intellipoint driver and that seemed to quieten the
problem for a few days, but lo and behold it is back again.

I have tried reprogramming the button functions in the Intellipoint control
panel, but that didn't help either. Has anyone else encountered this and more
to the point - found a fix for it?

(Using Office 2003 Pro on Win XP Pro)
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Regards - Peter