[bug] strange error on csv import new data

[batonac]

I'm trying to import new csv data into a list with five columns. On import fabrik shows a mysql error complaining that a required column is not being populated.

Much more revealing is the error I get from my web server log:

2013/07/31 17:58:40 [error] 868#0: *1104 FastCGI sent in stderr: "
PHP message: PHP Warning:  array_key_exists() expects parameter 2 to be array, null given in /srv/www/domain.com/components/com_fabrik/models/element.php on line 5142
PHP message: PHP Warning:  array_key_exists() expects parameter 2 to be array, null given in /srv/www/domain.com/components/com_fabrik/models/element.php on line 5142
PHP message: PHP Warning:  array_key_exists() expects parameter 2 to be array, null given in /srv/www/domain.com/components/com_fabrik/models/element.php on line 5142
PHP message: PHP Warning:  array_key_exists() expects parameter 2 to be array, null given in /srv/www/domain.com/components/com_fabrik/models/element.php on line 5142
PHP message: PHP Warning:  array_key_exists() expects parameter 2 to be array, null given in /srv/www/domain.com/components/com_fabrik/models/element.php on line 5142
" while reading response header from upstream, client: 174.60.220.140, server: domain.com, request: "POST /index.php?option=com_fabrik HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "domain.com", referrer: "http://domain.com/index.php?option=com_fabrik&view=import&filetype=csv&listid=10"

As you can see, the import trips an error on 'array_key_exists()' for every one of my elements/columns.