I have similar problem

 

I checked directory permissions on my server and set to 775 and stopped getting the "Error while parsing the Languages fileLanguages/en-US.xml".

 

Now the site just "hangs" and does not display the page from the point where the editor should be.

 

Adam: i have sent you a username/password via email so you can test on my site.

 

(sorry about poor english - i am portuguese)