As per anonym's suggestion above, I replaced my mouse, even though I wasn't seeing kernel messages about USB.
Result: I haven't seen a single keyboard repeat in two weeks!
For info, my old mouse (the one that apparently was causing the problems) was a Logitech "Wheel Mouse" from 1998. The new one (which causes no keyboard repeats) is a Microsoft "Wheel Mouse Optical 1.1A USB" and is probably 3-4 years old.
As per anonym's suggestion above, I replaced my mouse, even though I wasn't seeing kernel messages about USB.
Result: I haven't seen a single keyboard repeat in two weeks!
For info, my old mouse (the one that apparently was causing the problems) was a Logitech "Wheel Mouse" from 1998. The new one (which causes no keyboard repeats) is a Microsoft "Wheel Mouse Optical 1.1A USB" and is probably 3-4 years old.