My dashboard display an error message.

Can someone explain what is the meaning of the error here? I get this error message on my dashboard.

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Array ( [normal] => Array ( [core] => Array ( [dashboard_right_now] => Array ( [id] => dashboard_right_now [title] => Right Now [callback] => wp_dashboard_right_now [args] => ) [dashboard_recent_comments] => Array ( [id] => dashboard_recent_comments [title] => Recent Comments [callback] => wp_dashboard_recent_comments [args] => ) [dashboard_incoming_links] => Array ( [id] => dashboard_incoming_links [title] => Incoming Links [callback] => wp_dashboard_incoming_links [args] => ) ) ) [side] => Array ( [core] => Array ( [dashboard_quick_press] => Array ( [id] => dashboard_quick_press [title] => QuickPress [callback] => wp_dashboard_quick_press [args] => ) [dashboard_recent_drafts] => Array ( [id] => dashboard_recent_drafts [title] => Recent Drafts [callback] => wp_dashboard_recent_drafts [args] => ) [dashboard_primary] => Array ( [id] => dashboard_primary [title] => WordPress Blog [callback] => wp_dashboard_primary [args] => ) [dashboard_secondary] => Array ( [id] => dashboard_secondary [title] => Other WordPress News [callback] => wp_dashboard_secondary [args] => ) ) ) )

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Need help!