Thanks for your help. I have implemented the change you suggested to unbind C-w.

When I do C-h k C-SPC it shows C-SPC- in the minbuffer, indicating that C-SPC has been set as a prefix key. After checking some more it seems to arise from the fact that I am using SPC as my leader, so in insert mode, C-SPC seems to be working like a leader key, although I may be completely off-base here.

On Tue, Sep 23, 2014 at 6:27 PM, Michael Markert <markert.michael@gmail.com> wrote:
On Tue, Sep 23 2014 (20:36), RC <recif@yahoo.com> wrote:

> evil-mode seems to take over the C-w and C-SPC key bindings.
> I was able to unbind C-w using the following commands, but C-SPC still
> seems bound in insert mode.

C-w is bound to the window map,

    (define-key evil-motion-state-map (kbd "C-w") nil)

should fix that for you.

C-SPC, however, is not bound in any state. What does `C-h k C-SPC`
report?

> (eval-after-load "evil-maps"
>   (dolist (map '(evil-motion-state-map
>                  evil-insert-state-map
>                  evil-emacs-state-map))
>     (define-key (eval map) "\C-w" nil)))

And this is broken, it will be evaluated right away, not after loading
evil. You need to quote the form:

    (eval-after-load "evil-maps"
      '(dolist (map '(evil-motion-state-map
                      evil-insert-state-map
                      evil-emacs-state-map))
        (define-key (eval map) "\C-w" nil)))

And using `list' instead of a quote makes `eval' unnecessary:

    (eval-after-load "evil-maps"
      '(dolist (map (list evil-motion-state-map
                          evil-insert-state-map
                          evil-emacs-state-map))
        (define-key map "\C-w" nil)))

Michael