php errors

nice plugin. still a little buggy. when saving a module content, got this error:

Warning: Invalid argument supplied for foreach() inccc/wp-content/plugins/module-positions/module-positions.php on line 1036

Warning: Invalid argument supplied for foreach() in ccc/wp-content/plugins/module-positions/module-positions.php on line 1036

Warning: Cannot modify header information – headers already sent by (output started at ccc/wp-content/plugins/module-positions/module-positions.php:1036) in ccc/wp-includes/pluggable.php on line 876

http://wordpress.org/plugins/module-positions/