TrackPoint hard to control after Debian update

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http://unix.stackexchange.com – I'm on debian testing, and after rebooting (after an uptime of 3 weeks or so, that included a bunch of package updates, I believe including the kernel) the other day, the fine-adjustment - what a golfer would call putting - of the mouse pointer position gets really hard, it feels like the pointer is still moving, although the the trackpoint is already back at its center position. Using the trackpoint is no fun anymore, it takes seconds just to select a bunch of words. I don't think it's just a trackpoint performance configuration setting. It might be some threshold or the deactivation of some (HowTos)