error after front end log in.

Hi,
Since a few days i have an error. It appears when i log in on the frontend and go to a flexcontent category. It seems there is something missing, but i can't figure out what it is.

Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given in /home/stichtin/public_html/libraries/joomla/database/database/mysqli.php on line 360

Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given in /home/stichtin/public_html/libraries/joomla/database/database/mysqli.php on line 360

Warning: Invalid argument supplied for foreach() in /home/stichtin/public_html/components/com_flexicontent/classes/flexicontent.fields.php on line 68

Warning: Invalid argument supplied for foreach() in /home/stichtin/public_html/components/com_flexicontent/classes/flexicontent.fields.php on line 74

When putting Debug on:
500 - JDatabaseMySQL::query: 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') )ORDER BY ordering ASC'
at line 1 SQL=SELECT c.*, CASE WHEN CHAR_LENGTH( c.alias ) THEN CONCAT_WS( ':', c.id, c.alias ) ELSE c.id END AS slug FROM jos_categories AS c WHERE c.published = 1 AND c.parent_id = 28 AND ( c.access <= 2 OR c.id IN () ) ORDER BY ordering ASC

FLEXIcontent version 1.5.5 stable (r607)
Joomla! 1.5.23 Stable
Thanx a lot for your kind help.

i'm also using FlexiAccess.

I found the query mentioned in the previous post in com_flexicontent\models\category.php in line 445.
It seems there is something wrong with filter by permissions (line 432).

hello
can you do a backup and try to update to 1.5.6 beta 2 ?
code.google.com/p/flexicontent/d ... z&can=2&q=
regards