new edit fatal error only from frontend

Hi,
From the frontend while editing different type of content i had no problem since several months.
But few days ago starts a new pb with one of the custom type of content (a simple article with 2 cusotm fields).
While editing from frontend this type, which was ok before, here is the error i have

Notice: Undefined variable: params in /srv/www/htdocs/joomla/components/com_flexicontent/views/items/view.html.php on line 316 Fatal error: Call to a member function get() on a non-object in /srv/www/htdocs/joomla/components/com_flexicontent/views/items/view.html.php on line 316

and here this famous line 316
$allowunauthorize $params->get('allowunauthorize',0);

my configuration is
FlexiAccess version 1.0.5
FLEXIcontent version 1.5.5 stable (r607)

Thks in advance for your help
Rgds
Sylvain

You should read
while editing an item of this type ... the error is...

thks

at first update to last NG 1.5.5 have too much bug ..
code.google.com/p/flexicontent/d ... z&can=2&q=
after re test