theme english .mo file not working, other .mo files ok

Hello,

I’m running a site with a localized custom theme. The site has 4 languages and the translation plugin is polylang.

I used codestyling localization to handle the translation of the localized strings. The default is dutch, other languages are english french and spanish.

Everything works fine, except for the English localization. It doesn’ show the English but the default Dutch. Backend, everything works fine. Your plugin shows all the theme .po and .mo files just fine. But, the English one: en_US.mo just doesn’t work.

I tried:
Deleting the english files inside the plugin and creating them anew.
Removing the plugin and theme lang folder + reinstalling plugin + recreating the .po and .mo files.
These didn’t work.

I also pulled this en_US.mo for the server and tried it on aonther wp install and it worked just fine.

This last one led me to conclude that the .mo files are fine. Do you have any ideas how I could solve this, where to look? I’m clueless.

http://wordpress.org/plugins/codestyling-localization/