Index: wp-includes/category-template.php
===================================================================
--- wp-includes/category-template.php	(revision 24487)
+++ wp-includes/category-template.php	(working copy)
@@ -37,7 +37,7 @@
  * @param string $separator Optional, default is '/'. How to separate categories.
  * @param bool $nicename Optional, default is false. Whether to use nice name for display.
  * @param array $visited Optional. Already linked to categories to prevent duplicates.
- * @return string
+ * @return string|WP_Error A list of category parents on success, WP_Error on failure.
  */
 function get_category_parents( $id, $link = false, $separator = '/', $nicename = false, $visited = array() ) {
 	$chain = '';
@@ -131,7 +131,7 @@
  * @since 0.71
  *
  * @param int $cat_ID Category ID.
- * @return string Category name.
+ * @return string|WP_Error Category name on success, WP_Error on failure.
  */
 function get_the_category_by_ID( $cat_ID ) {
 	$cat_ID = (int) $cat_ID;
@@ -980,7 +980,7 @@
  * @uses apply_filters() Calls 'get_the_tags' filter on the list of post tags.
  *
  * @param int $id Post ID.
- * @return array
+ * @return array|bool Array of tag objects on success, false on failure.
  */
 function get_the_tags( $id = 0 ) {
 	return apply_filters( 'get_the_tags', get_the_terms( $id, 'post_tag' ) );
@@ -996,7 +996,7 @@
  * @param string $sep Optional. Between tags.
  * @param string $after Optional. After tags.
  * @param int $id Optional. Post ID. Defaults to the current post.
- * @return string
+ * @return string|bool|WP_Error A list of tags on success, false or WP_Error on failure.
  */
 function get_the_tag_list( $before = '', $sep = '', $after = '', $id = 0 ) {
 	return apply_filters( 'the_tags', get_the_term_list( $id, 'post_tag', $before, $sep, $after ), $before, $sep, $after, $id );
@@ -1010,7 +1010,6 @@
  * @param string $before Optional. Before list.
  * @param string $sep Optional. Separate items using this.
  * @param string $after Optional. After list.
- * @return string
  */
 function the_tags( $before = null, $sep = ', ', $after = '' ) {
 	if ( null === $before )
@@ -1056,7 +1055,7 @@
  *
  * @param mixed $post Post ID or object.
  * @param string $taxonomy Taxonomy name.
- * @return array|bool False on failure. Array of term objects on success.
+ * @return array|bool|WP_Error Array of term objects on success, false or WP_Error on failure.
  */
 function get_the_terms( $post, $taxonomy ) {
 	if ( ! $post = get_post( $post ) )
@@ -1086,7 +1085,7 @@
  * @param string $before Optional. Before list.
  * @param string $sep Optional. Separate items using this.
  * @param string $after Optional. After list.
- * @return string
+ * @return string|bool|WP_Error A list of terms on success, false or WP_Error on failure.
  */
 function get_the_term_list( $id, $taxonomy, $before = '', $sep = '', $after = '' ) {
 	$terms = get_the_terms( $id, $taxonomy );
Index: wp-includes/formatting.php
===================================================================
--- wp-includes/formatting.php	(revision 24487)
+++ wp-includes/formatting.php	(working copy)
@@ -3116,7 +3116,7 @@
  *
  * @since 2.5.0
  *
- * @param integer $str String to get the excerpt from.
+ * @param string $str String to get the excerpt from.
  * @param integer $count Maximum number of characters to take.
  * @param string $more Optional. What to append if $str needs to be trimmed. Defaults to empty string.
  * @return string The excerpt.
Index: wp-includes/js/quicktags.js
===================================================================
--- wp-includes/js/quicktags.js	(revision 24487)
+++ wp-includes/js/quicktags.js	(working copy)
@@ -296,14 +296,14 @@
 	 *     QTags.addButton( 'my_id', 'my button', '<span>', '</span>' );
 	 *     QTags.addButton( 'my_id2', 'my button', '<br />' );
 	 *
-	 * @param id string required Button HTML ID
-	 * @param display string required Button's value="..."
-	 * @param arg1 string || function required Either a starting tag to be inserted like "<span>" or a callback that is executed when the button is clicked.
-	 * @param arg2 string optional Ending tag like "</span>"
-	 * @param access_key string optional Access key for the button.
-	 * @param title string optional Button's title="..."
-	 * @param priority int optional Number representing the desired position of the button in the toolbar. 1 - 9 = first, 11 - 19 = second, 21 - 29 = third, etc.
-	 * @param instance string optional Limit the button to a specifric instance of Quicktags, add to all instances if not present.
+	 * @param string id Required. Button HTML ID
+	 * @param string display Required. Button's value="..."
+	 * @param string|function arg1 Required. Either a starting tag to be inserted like "<span>" or a callback that is executed when the button is clicked.
+	 * @param string arg2 Optional. Ending tag like "</span>"
+	 * @param string access_key Optional. Access key for the button.
+	 * @param string title Optional. Button's title="..."
+	 * @param int priority Optional. Number representing the desired position of the button in the toolbar. 1 - 9 = first, 11 - 19 = second, 21 - 29 = third, etc.
+	 * @param string instance Optional. Limit the button to a specifric instance of Quicktags, add to all instances if not present.
 	 * @return mixed null or the button object that is needed for back-compat.
 	 */
 	qt.addButton = function( id, display, arg1, arg2, access_key, title, priority, instance ) {
Index: wp-includes/post.php
===================================================================
--- wp-includes/post.php	(revision 24487)
+++ wp-includes/post.php	(working copy)
@@ -725,9 +725,9 @@
  * @uses sanitize_post_field() See for possible $context values.
  *
  * @param string $field Post field name
- * @param id $post Post ID
- * @param string $context Optional. How to filter the field. Default is display.
- * @return bool|string False on failure or returns the value in post field
+ * @param int $post Post ID
+ * @param string $context Optional. How to filter the field. Default is 'display'.
+ * @return string The value of the post field on success, empty string on failure.
  */
 function get_post_field( $field, $post, $context = 'display' ) {
 	$post = get_post( $post );
@@ -750,7 +750,7 @@
  * @since 2.0.0
  *
  * @param int $ID Optional. Post ID.
- * @return bool|string False on failure or returns the mime type
+ * @return string|bool The mime type on success, false on failure.
  */
 function get_post_mime_type($ID = '') {
 	$post = get_post($ID);
@@ -770,7 +770,7 @@
  * @since 2.0.0
  *
  * @param int $ID Post ID
- * @return string|bool Post status or false on failure.
+ * @return string|bool Post status on success, false on failure.
  */
 function get_post_status($ID = '') {
 	$post = get_post($ID);
@@ -1012,7 +1012,7 @@
  * @uses $post The Loop current post global
  *
  * @param mixed $post Optional. Post object or post ID.
- * @return bool|string post type or false on failure.
+ * @return string|bool Post type on success, false on failure.
  */
 function get_post_type( $post = null ) {
 	if ( $post = get_post( $post ) )