install Ruby 1.9.3-p545 and devkit for this version ( DevKit-tdm-32-4.5.2-20111229-1559-sfx.exe ) or

sudo apt-get install ruby-dev

Reinstall compass and sass.

I had a problems with foundation 5 and compass a couple of days ago.
The fix problems with compilations and bower.json file is realy easy.

1. Install the lastes compass gem version ( 1.1.0) using command prompt.

 [sudo] gem install compass [--version 1.1.0]

1. Install sass gem using version 3.4.0

[sudo] gem install sass --version 3.4.0

1. Uninstall sass gem with 3.4.3 version.

[sudo] gem uninstall sass
press 2 for select sass-gem 3.4.3v

 [sudo] gem uninstall sass
press 2 for select sass-gem 3.4.3v

I change string to "overlap" and it works fine. I don't know what i should to do, becouse i using Foundation with bower and Compass. I also checked my js links and everything is ok.

P.S. I created new foundation project and update all files by "bower update" and i had same problem.
Bellow you will find my js links.

    <script src="bower_components/jquery/dist/jquery.min.js"></script>
    <script src="bower_components/foundation/js/foundation.js"></script>
    <script src="bower_components/foundation/js/foundation/foundation.offcanvas.js"></script>
    <script>
    $(document).foundation({
      offcanvas : { open_method: 'overlap_single', close_on_click : true }
    });
    </script>

UPDATE
I checked foundation.js file and i didn't find open_metod string called "single_overlap". I downloaded from Foundation website full represitory. A solution of this problem is manully event binding.

Ok, i found a solution to this problem on forum. I do apologise for stiupid question. Have a nice day.

How about offcanvas-list with accordion ? Can you add to docs information how to use it ?