UPDATE 2: NOT SOLVED AFTER ALL
Unfortunately this setting gets reset after EVERY SINGLE REBOOT.
I have a Lenovo Thinkpad (T400) that has been configured to use the middle button above the touchpad as a middle-click button. (works just fine)
However when you click 3 or more times in a short time span (~3 seconds) it pops up a dialog:
TrackPoint Scrolling Tips [X]
Would you like to learn how to use center button for the TrackPoint scrolling feature?
[_] Don't show this reminder again
This reminder can be re-enabled on the TrackPoint Properties page in the ControlPanel
I would be quite happy if I could click the checkbox and then the No button but that doesn't make the dialog go away forever... nor does clicking the checkbox and the Yes button, or checkbox and the [X]... or any other combo.
Does anyone know where the registry setting for this is so that I can force it to never ever show up again?
Original UPDATE: Thought to be solved
The dialog that pops up is useless at changing the settings but going deep, deep, deep into the control panel shows a dialog that lets you turn off the "tips".
Start > Control Panel > Mouse > UltraNav > TrackPoint > Settings > [_] Enable TrackPoint Scrolling Tips > OK