Apple :: Randomly / Rarely Jumpy MM (and Once Trackpad) Pointer Motion

I have recently noted that, sometimes (randomly and rarely for the time being), the pointer of my bluetooth MM (Mighty Mouse) moves farther than what I was expecting it to move. This happened probably in concomitance with the opening of some application (Iphoto once). In other words, it appeared to me that the pointer accelerated more than what I demanded it to move with the displacement of the mouse. It was not really a uncontrolled jump (as it sometimes happens with optical mice) but like a transitory but self-contained loss of pointer control.

I believe that a similar event occurred also once with the trackpad pointer when I went to the bottom of the screen to make dock appear in concomitance with a skype call launch....the pointer seemed to move fast to the right although I am quite sure it was not my finger to command this motion on the pad.

I have tried (with respect to MM) to delete and recreate the bluetooth .plist but it did not prevent from having this occurrence (note also that the batteries are OK).
I have read in some other forum, here in this site, that this might be due to OSX pointer acceleration (not perfect) management.