Files in data folder are creating Locales folders

I am running ruby 1.9.3p429 (2013-05-15) [i386-mingw32] on a Windows 8 machine. Since updating to Middleman 3.1 any time I run middleman server or middleman build the files located in the data folder are being turned into directory (e.g. default_en.yml becomes the folder default_en). See the below output when running middleman server --verbose .

Is there something I need to update or change to support version middleman 3.1?

== The Middleman is loading  
== Activating: sprockets  
== File Change: data/defaults_cn.yml  
== File Change: data/defaults_en.yml  
== File Change: data/defaults_kr.yml  
== File Change: data/defaults_th.yml  
== File Change: data/defaults_tw.yml  
== File Change: data/_partials/email_settings.xlsm  
== Reading:  Local config  
== Activating: i18n  
== Activating: livereload  
== Activating: edm_helpers  
== File Change: locales/cn.yml  
== File Change: locales/en.yml  
== File Change: locales/kr.yml  
== File Change: locales/th.yml  
== File Change: locales/tw.yml  
== File Change: locales/_partials/site_copy.xlsm  
== Locales: cn, defaults_cn, defaults_en, defaults_kr, defaults_th, defaults_tw, en, kr, th, tw (Default false)  
...

Gems included by the bundle:

  * activesupport (3.2.12)
  * addressable (2.3.4)
  * bundler (1.3.1)
  * chunky_png (1.2.8)
  * coffee-script (2.2.0)
  * coffee-script-source (1.6.2)
  * compass (0.12.2)
  * css_parser (1.3.4)
  * dimensions (1.2.0)
  * em-websocket (0.5.0)
  * eventmachine (1.0.3)
  * execjs (1.4.0)
  * ffi (1.9.0)
  * fssm (0.2.10)
  * haml (4.0.3)
  * hike (1.2.3)
  * htmlentities (4.3.1)
  * http_parser.rb (0.5.3)
  * i18n (0.6.4)
  * kramdown (1.0.2)
  * listen (1.1.6)
  * mail (2.5.4)
  * middleman (3.1.1)
  * middleman-core (3.1.1)
  * middleman-livereload (3.1.0)
  * middleman-more (3.1.1)
  * middleman-sprockets (3.1.2)
  * mime-types (1.23)
  * mini_portile (0.5.0)
  * multi_json (1.7.7)
  * nokogiri (1.6.0)
  * polyglot (0.3.3)
  * premailer (1.7.3)
  * rack (1.5.2)
  * rack-livereload (0.3.15)
  * rack-test (0.6.2)
  * rb-fsevent (0.9.3)
  * rb-inotify (0.9.0)
  * rb-kqueue (0.2.0)
  * sass (3.2.9)
  * sprockets (2.10.0)
  * sprockets-helpers (1.0.1)
  * sprockets-sass (1.0.1)
  * thor (0.18.1)
  * tilt (1.3.7)
  * treetop (1.4.14)
  * uglifier (2.1.1)
  * wdm (0.1.0)

My config.rb contains the following:

activate :i18n, :mount_at_root => false

Found a bug in one of our regexes for finding i18n files. Pushing out middleman v3.1.2 in just a second to fix that.

Thanks, I really appreciate the prompt fix.
I have updated to 3.1.2 and it is working as expected now.