Sylvain, thanks saving my time :)

Effectively the issue is only windmove.el related.

2012/1/20 Sylvain Rousseau <thisirs@gmail.com>

> For example:
>
> emacs -Q --eval "(progn (toggle-truncate-lines 1) \
> (split-window-right) \
> (other-window 1) \
> (split-window-below) \
> (insert
> \"blahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblahblah\"))"
>
> Then try to windmove-down, it moves left! :/
>
> window-in-direction seems to be doing fine anyway!
>
> Sylvain.
>



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