Index: wp-admin/includes/meta-boxes.php
===================================================================
--- wp-admin/includes/meta-boxes.php	(revision 19911)
+++ wp-admin/includes/meta-boxes.php	(working copy)
@@ -35,6 +35,9 @@
 <img src="<?php echo esc_url( admin_url( 'images/wpspin_light.gif' ) ); ?>" class="ajax-loading" id="draft-ajax-loading" alt="" />
 </div>
 
+<?php
+if( $post_type_object->public ) {
+?>
 <div id="preview-action">
 <?php
 if ( 'publish' == $post->post_status ) {
@@ -51,6 +54,9 @@
 <a class="preview button" href="<?php echo $preview_link; ?>" target="wp-preview" id="post-preview" tabindex="4"><?php echo $preview_button; ?></a>
 <input type="hidden" name="wp-preview" id="wp-preview" value="" />
 </div>
+<?php
+}
+?>
 
 <div class="clear"></div>
 </div><?php // /minor-publishing-actions ?>