Errors after sumbit

An application error occured, please notify an admin if you believe this should be fixed.

2014-04-27T15:02:15.809Z - TypeError: /var/www/html/paste/app/views/show.jade:4
    2| 
    3| block content

> 4|   header
>     5|     ul.middot_list
>     6|       mixin time(paste)
>     7|       if paste.language != 'plain'

Cannot call method 'replace' of undefined
