Problem with functions.php

I am having been adding some features to my site through the functions.php however in the last day or so it has started giving me this error:

Warning: Cannot modify header information – headers already sent by (output started at /home4/rhythmsn/public_html/wp-content/themes/rhythm2012/functions.php:269) in /home4/rhythmsn/public_html/wp-includes/pluggable.php on line 890

Any helps would be much appreciated. Here is my functions.php

<?php

// ------------------------- General -------------------------

// Custom CSS styles on WYSIWYG Editor - Start

	if ( ! function_exists( 'myCustomTinyMCE' ) ) :
	function myCustomTinyMCE($init) {
		$init['theme_advanced_disable'] = 'outdent, separator, strikethrough, blockquote, indent, justifyleft, justifycenter, justifyright, justifyfull, bullist, numlist, outdent, indent, fontselect, fontsizeselect, forecolor, backcolor, forecolorpicker, backcolorpicker, formatselect'; // Removes the undesired buttons
		$init['theme_advanced_buttons2_add_before'] = 'styleselect'; // Adds the buttons at the begining. (theme_advanced_buttons2_add adds them at the end)
		$init['theme_advanced_styles'] = 'Photo Caption=caption';
	 return $init;
	}
	endif;
	add_filter('tiny_mce_before_init', 'myCustomTinyMCE' );
	add_filter( 'mce_css', 'tdav_css' );

	// incluiding the Custom CSS on our theme.

	function mycustomStyles(){
		wp_enqueue_style( 'myCustomStyles', get_bloginfo('template_url').'/css/tinyMCE.css', '','','all' );
	}
	add_action('init', 'mycustomStyles');

// Custom CSS styles on WYSIWYG Editor - End

// ------------------------- Remove Dashboard Widgets -------------------------

// remove dashboard widgets
function example_remove_dashboard_widgets() {

// load the metaboxes array as a global variable
global $wp_meta_boxes;

// side widgets
unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_primary']);
unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_secondary']);

//normal widgets
unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_incoming_links']);
unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_plugins']);
}

// Hoook into the 'wp_dashboard_setup' action to remove the widgets defined above
add_action('wp_dashboard_setup', 'example_remove_dashboard_widgets' );

// ------------------------- Remove Menu Items -------------------------

// function to remove the Links menu item
function remove_menus() {

// setup the global menu variable
global $menu;

// this is an array of the menu item names we wish to remove
$restricted = array( __('Links'),__('Tools'),__('Settings'),__('Comments'));
end ($menu);

while (prev($menu)) {
$value = explode(' ',$menu[key($menu)][0]);

if(in_array($value[0] != NULL?$value[0]:"" , $restricted)) {
unset($menu[key($menu)]);
		}
	}
}

// hook into the action that creates the menu
add_action('admin_menu', 'remove_menus');

// ------------------------- Events -------------------------

// Custom Post Type for Events

add_action( 'init', 'create_Events' );
function create_Events() {
  $labels = array(
    'name' => _x('Events', 'post type general name'),
    'singular_name' => _x('Events', 'post type singular name'),
    'add_new' => _x('Add New', 'Event'),
    'add_new_item' => __('Add New Event'),
    'edit_item' => __('Edit Event'),
    'new_item' => __('New Event'),
    'view_item' => __('View Event'),
    'search_items' => __('Search Events'),
    'not_found' =>  __('No Events found'),
    'not_found_in_trash' => __('No Events found in Trash'),
    'parent_item_colon' => ''
  );

  $supports = array('title', 'custom-fields', 'revisions');

  register_post_type( 'Event',
    array(
      'labels' => $labels,
      'public' => true,
      'supports' => $supports
    )
  );
}

// ------------------------- Slideshow -------------------------

// Custom Post Type for Slideshow

add_action( 'init', 'create_Slide' );
function create_Slide() {
  $labels = array(
    'name' => _x('Slideshow', 'post type general name'),
    'singular_name' => _x('Slide', 'post type singular name'),
    'add_new' => _x('Add New', 'Slide'),
    'add_new_item' => __('Add New Slide'),
    'edit_item' => __('Edit Slide'),
    'new_item' => __('New Slide'),
    'view_item' => __('View Slide'),
    'search_items' => __('Search Slides'),
    'not_found' =>  __('No Slides found'),
    'not_found_in_trash' => __('No Slides found in Trash'),
    'parent_item_colon' => ''
  );

  $supports = array('title', 'custom-fields', 'revisions');

  register_post_type( 'Slide',
    array(
      'labels' => $labels,
      'public' => true,
      'supports' => $supports
    )
  );
}

// ------------------------- Boards -------------------------

// Custom Post Type for Boards

add_action( 'init', 'create_Boards' );
function create_Boards() {
  $labels = array(
    'name' => _x('Boards', 'post type general name'),
    'singular_name' => _x('Boards', 'post type singular name'),
    'add_new' => _x('Add New', 'Board'),
    'add_new_item' => __('Add New Board'),
    'edit_item' => __('Edit Board'),
    'new_item' => __('New Board'),
    'view_item' => __('View Board'),
    'search_items' => __('Search Boards'),
    'not_found' =>  __('No Boards found'),
    'not_found_in_trash' => __('No Boards found in Trash'),
    'parent_item_colon' => ''
  );

  $supports = array('title', 'editor', 'custom-fields', 'revisions');

  register_post_type( 'Board',
    array(
      'labels' => $labels,
      'public' => true,
      'supports' => $supports
    )
  );
}

// Meta Data for Boards

$key = "key";
$meta_boxes = array(

	"name" => array(
	"name" => "name",
	"title" => "Name",
	"description" => ""),

	"camber" => array(
	"name" => "camber",
	"title" => "Camber",
	"description" => ""),

	"shape" => array(
	"name" => "shape",
	"title" => "Shape",
	"description" => ""),

	"contruction" => array(
	"name" => "construction",
	"title" => "Construction",
	"description" => ""),

	"good" => array(
	"name" => "good",
	"title" => "Good In",
	"description" => ""),

	"flex" => array(
	"name" => "flex",
	"title" => "Flex",
	"description" => ""),

	"price" => array(
	"name" => "price",
	"title" => "Price",
	"description" => ""),
);

	function create_meta_box() {
	global $key;

		if( function_exists( 'add_meta_box' ) ) {
		add_meta_box( 'new-meta-boxes', ucfirst( $key ) . ' Custom Post Options', 'display_meta_box', 'Board', 'normal', 'high' );
		}
	}

	function display_meta_box() {
	global $post, $meta_boxes, $key;

?>

<!-- Needed for Boards Meta Data -->

<div class="form-wrap">

<?php

		wp_nonce_field( plugin_basename( __FILE__ ), $key . '_wpnonce', false, true );

		foreach($meta_boxes as $meta_box) {
		$data = get_post_meta($post->ID, $key, true);
		?>

		<div class="form-field form-required">

            <label for="<?php echo $meta_box[ 'name' ]; ?>"><?php echo $meta_box[ 'title' ]; ?></label>
            <input type="text" name="<?php echo $meta_box[ 'name' ]; ?>" value="<?php echo htmlspecialchars( $data[ $meta_box[ 'name' ] ] ); ?>" />
            <p><?php echo $meta_box[ 'description' ]; ?></p>

		</div>

<?php } ?>

</div>

<?php
}

function save_meta_box( $post_id ) {
global $post, $meta_boxes, $key;

	foreach( $meta_boxes as $meta_box ) {
	$data[ $meta_box[ 'name' ] ] = $_POST[ $meta_box[ 'name' ] ];
	}

	if ( !wp_verify_nonce( $_POST[ $key . '_wpnonce' ], plugin_basename(__FILE__) ) )
	return $post_id;

	if ( !current_user_can( 'edit_post', $post_id ))
	return $post_id;

	update_post_meta( $post_id, $key, $data );
	}

	add_action( 'admin_menu', 'create_meta_box' );
	add_action( 'save_post', 'save_meta_box' );

?>

<!-- Events Data -->

<?php

$key_event = "key";
$meta_boxes = array(

	"name" => array(
	"name" => "event",
	"title" => "Event",
	"description" => ""),

	"camber" => array(
	"name" => "startdate",
	"title" => "Start Date",
	"description" => ""),

	"shape" => array(
	"name" => "enddate",
	"title" => "End Date",
	"description" => ""),

	"contruction" => array(
	"name" => "location",
	"title" => "Location",
	"description" => ""),
);

function create_event_meta_box() {
global $key_event;

if( function_exists( 'add_meta_box' ) ) {
add_meta_box( 'new-meta-boxes', ucfirst( $key_event ) . ' Custom Post Options', 'display_meta_box', 'Event', 'normal', 'high' );
}
}

function display_event_meta_box() {
global $post, $meta_boxes, $key_event;
?>

<div class="form-wrap">

<?php
wp_nonce_field( plugin_basename( __FILE__ ), $key_event . '_wpnonce', false, true );

foreach($meta_boxes as $meta_box) {
$data_event = get_post_meta($post->ID, $key_event, true);
?>

<div class="form-field form-required">
<label for="<?php echo $meta_box[ 'name' ]; ?>"><?php echo $meta_box[ 'title' ]; ?></label>
<input type="text" name="<?php echo $meta_box[ 'name' ]; ?>" value="<?php echo htmlspecialchars( $data_event[ $meta_box[ 'name' ] ] ); ?>" />
<p><?php echo $meta_box[ 'description' ]; ?></p>
</div>

<?php } ?>

</div>
<?php
}

function save_event_meta_box( $post_id ) {
global $post, $meta_boxes, $key_event;

foreach( $meta_boxes as $meta_box ) {
$data_event[ $meta_box[ 'name' ] ] = $_POST[ $meta_box[ 'name' ] ];
}

if ( !wp_verify_nonce( $_POST[ $key_event . '_wpnonce' ], plugin_basename(__FILE__) ) )
return $post_id;

if ( !current_user_can( 'edit_post', $post_id ))
return $post_id;

update_post_meta( $post_id, $key_event, $data_event );
}

add_action( 'admin_menu', 'create_event_meta_box' );
add_action( 'save_post', 'save_event_meta_box' );

?>