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<?php
//* Do NOT include the opening php tag shown above. Copy the code shown below.

<!-- 
A way to expand the block formats (theme_advanced_blockformats) or modify and disable a few buttons in your editor (theme_advanced_disable). 
-->

function fb_change_mce_buttons( $initArray ) {
    //@see http://wiki.moxiecode.com/index.php/TinyMCE:Control_reference
    $initArray['theme_advanced_blockformats'] = 'p,address,pre,code,h3,h4,h5,h6';
    $initArray['theme_advanced_disable'] = 'forecolor';

    return $initArray;
}
add_filter('tiny_mce_before_init', 'fb_change_mce_buttons');