Re: Weird problem with mouse-autoselect-window

[Richard Stallman]

    This is on a Linux box under X, btw.

If it is running GNU and Linux, please call it a GNU/Linux box.  This
helps us just as fixing bugs in Emacs helps us--but it is much less
work!

    emacs -q --no-site-file
    C-h v mouse-autoselect-window RET
    Click on customize this variable
    Toggle the value on.
    Set for current session.
    Move mouse over *Help* window.
    Hit TAB.

    You should see "No buttons or fields found".

When you switch frames, Emacs generates a switch-frame
event whose purpose is to wake up read_key_sequence
so it will reread the keymaps of the new frame.
Something similar needs to be done for mouse-autoselect-window.
I would guess that that mechanism either isn't happening
or is working wrong.