Index: class-wp-theme.php
===================================================================
--- class-wp-theme.php	(revision 25397)
+++ class-wp-theme.php	(working copy)
@@ -299,8 +299,11 @@
 
 	/**
 	 * __isset() magic method for properties formerly returned by current_theme_info()
+     * Use appropriate method to obtain WP_Theme properties.
 	 */
 	public function __isset( $offset ) {
+        
+        _doing_it_wrong( __METHOD__, sprintf( __( 'Please use the appropriate, public WP_Theme method: %s.' ), $this->_deprecated( $offset ) ), '3.7' );
 		static $properties = array(
 			'name', 'title', 'version', 'parent_theme', 'template_dir', 'stylesheet_dir', 'template', 'stylesheet',
 			'screenshot', 'description', 'author', 'tags', 'theme_root', 'theme_root_uri',
@@ -308,11 +311,38 @@
 
 		return in_array( $offset, $properties );
 	}
+    
+    /**
+	 * Generate appropriate WP_Theme method for _doing_it_wrong notice.
+	 */
+    private function _deprecated( $offset ) {
+        $properties = array(
+			'name'           => "wp_get_theme()->get('Name')",
+            'title'          => "wp_get_theme()->get('Name')",
+            'version'        => "wp_get_theme()->get('Version')",
+            'parent_theme'   => "wp_get_theme()->parent() ? wp_get_theme()->->parent() : wp_get_theme()->get('Name')",
+            'template_dir'   => "wp_get_theme()->get_template_directory()",
+            'stylesheet_dir' => "wp_get_theme()->get_stylesheet_directory()",
+            'template'       => "wp_get_theme()->get_template()",
+            'stylesheet'     => "wp_get_theme()->get_stylesheet()",
+			'screenshot'     => "wp_get_theme()->get_screenshot()",
+            'description'    => "wp_get_theme()->display('description')",
+            'author'         => "wp_get_theme()->display('author')",
+            'tags'           => "wp_get_theme()->get('Tags')",
+            'theme_root'     => "wp_get_theme()->get_theme_root()",
+            'theme_root_uri' => "wp_get_theme()->get_theme_root_uri()",
+            'default'        => "wp_get_theme()->offsetGet( $offset )",
+		);
+        return isset( $properties[ $offset ] ) ? $properties[ $offset ] : $properties['default'];
+    }
 
 	/**
 	 * __get() magic method for properties formerly returned by current_theme_info()
+     * Use appropriate method to obtain WP_Theme properties.
 	 */
 	public function __get( $offset ) {
+        _doing_it_wrong( __METHOD__, sprintf( __( 'Please use the appropriate, public WP_Theme method: %s.' ), $this->_deprecated( $offset ) ), '3.7' );
+        
 		switch ( $offset ) {
 			case 'name' :
 			case 'title' :
@@ -362,6 +392,7 @@
 	 * Method to implement ArrayAccess for keys formerly returned by get_themes()
 	 */
 	public function offsetExists( $offset ) {
+        _deprecated_function( __METHOD__, sprintf( __( 'Please use the appropriate, public WP_Theme method: %s.' ), $this->_deprecated( $offset ) ), '3.7' );
 		static $keys = array(
 			'Name', 'Version', 'Status', 'Title', 'Author', 'Author Name', 'Author URI', 'Description',
 			'Template', 'Stylesheet', 'Template Files', 'Stylesheet Files', 'Template Dir', 'Stylesheet Dir',