23 nov. 2019 kl. 15.53 skrev Eli Zaretskii <eliz@gnu.org>:

> Fine with me.

Good, mouse-fine-grained-tracking it is then.

> I think this would be better.  IME, such small windows eventually
> cause strange and hard to debug bugs, so any measures to make the
> window smaller or eliminate it are welcome.

The window has now been shrunk to almost nothing, and condition-case added for good measure. (Old code in mouse.el left untouched.)