Cursor jumps around the screen

After upgrading to Lion, moving my mouse will intermitently jump the cursor from it position in the middle of the screen to one of the edges. 
I will try to move the cursor an inch or so in the middle of the screen and find the cursor hitting one of the hot corners, which is really annoying when I go from clicking a toolbar item in the center of the screen to a sleeping display.
The mouse is a Magic Mouse, wtih a MacPro.  It worked fine with 10.6, but is annoying enough under Lion to make me want to ditch the mouse and try a track pad.
Anyone else seen this one?
Thanks.

I have a 2011 MacBook Pro (bought it in August).  I have it hooked up to a 21-inch monitor and a wired Mac extended keyboard.  I have a wireless Magic Trackpad, a wireless Magic Mouse, an old wireless Mac Mouse, and an old WIRED Mac Mouse.  (Note that I haven't been using them all at the same time, I turn each off if they are not in use).
My pointer jumps around when I use each one.  Given that the same jumpiness is occurring when I use my wired mouse, this would indicate that it is not a Bluetooth issue a...although my old wireless Mac Mouse is by far the worst performing of the four.
I submitted my feedback to Apple in August, no replies.  What a joke!

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