> But this will still use "the wrong buffer" for mouse clicks, no?
>
> BTW, maybe a cleaner fix would be as follows:
> - Add a `buffer` argument to `describe-key(-briefly)`.
> - Pass that argument from `gnus-article-describe-key`.
> And to get the behavior that Juri just pushed that `buffer` argument
> would default to (if (consp event) (window-buffer (posn-window
> (event-start event))) (current-buffere)).

Maybe something like this (but currently I have no idea how to test all cases):