diff --git a/wp-admin/includes/class-wp-list-table.php b/wp-admin/includes/class-wp-list-table.php
index 3acb4d5830..2e5c10df1c 100644
--- a/wp-admin/includes/class-wp-list-table.php
+++ b/wp-admin/includes/class-wp-list-table.php
@@ -850,8 +850,9 @@ class WP_List_Table {
 	 * @return array
 	 */
 	protected function get_column_info() {
-		if ( isset( $this->_column_headers ) )
+		if ( isset( $this->_column_headers ) && is_array( $this->_column_headers ) && count( $this->_column_headers ) >= 4 ) {
 			return $this->_column_headers;
+		}
 
 		$columns = get_column_headers( $this->screen );
 		$hidden = get_hidden_columns( $this->screen );
diff --git a/wp-admin/includes/class-wp-users-list-table.php b/wp-admin/includes/class-wp-users-list-table.php
index fc5ace6da4..d76c310975 100644
--- a/wp-admin/includes/class-wp-users-list-table.php
+++ b/wp-admin/includes/class-wp-users-list-table.php
@@ -411,6 +411,9 @@ class WP_Users_List_Table extends WP_List_Table {
 			if ( $primary === $column_name ) {
 				$classes .= ' has-row-actions column-primary';
 			}
+			if ( 'posts' === $column_name ) {
+				$classes .= ' num'; // Special case for that column
+			}
 
 			$style = '';
 			if ( in_array( $column_name, $hidden ) ) {
@@ -437,7 +440,6 @@ class WP_Users_List_Table extends WP_List_Table {
 						$r .= $role_name;
 						break;
 					case 'posts':
-						$attributes = 'class="posts column-posts num"' . $style;
 						if ( $numposts > 0 ) {
 							$r .= "<a href='edit.php?author=$user_object->ID' class='edit'>";
 							$r .= '<span aria-hidden="true">' . $numposts . '</span>';
diff --git a/wp-includes/version.php b/wp-includes/version.php
index ddf375dddf..47c03479a3 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-alpha-32716';
+$wp_version = '4.3-alpha-32717';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.