Warning: Invalid argument supplied for foreach() in form_type_checkboxes_value() (line 2391 of drupal7/includes/form.inc). =

The element is fb_post_user_settings[feed_id]

Warning: Invalid argument supplied for foreach() in form_type_checkboxes_value() (line 2391 of drupal7/includes/form.inc). =>

(Array, 22 elements)
#type (String, 10 characters ) checkboxes
#title (String, 10 characters ) Publish to
#options (Array, 26 elements)
#multiple (Boolean) TRUE
#default_value (NULL)
#description (String, 48 characters ) You may select a user's wall, or a managed page.
#input (Boolean) TRUE
#process (Array, 3 elements)
#theme_wrappers (Array, 1 element)
#pre_render (Array, 2 elements)
#after_build (Array, 1 element)
#defaults_loaded (Boolean) TRUE
#tree (Boolean) TRUE
#parents (Array, 2 elements)
#array_parents (Array, 3 elements)
#weight (Float) 0.003
#processed (Boolean) FALSE
#required (Boolean) FALSE
#attributes (Array, 0 elements)
#title_display (String, 6 characters ) before
#id (String, 34 characters ) edit-fb-post-user-settings-feed-id
#name (String, 30 characters ) fb_post_user_settings[feed_id]