postorius appends unwanted code in list_nav member preferences tab

On Opening member options for any of the subscribed members, postorius shows adds unwanted piece of code to the list nav header and the overall UI of postorius is in turn affected.

One Such Instance is as given:
 Project-Id-Version: django Report-Msgid-Bugs-To: POT-Creation-Date: 2014-05-20 12:20+0200 PO-Revision-Date: 2014-05-21 09:39+0000 Last-Translator: Jannis Leidel Language-Team: English (United Kingdom) (http://www.transifex.com/projects/p/django/language/en_GB/) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Language: en_GB Plural-Forms: nplurals=2; plural=(n != 1);

The Screenshot of One such Instance is attached along.