Index: wp-admin/includes/post.php
===================================================================
--- wp-admin/includes/post.php	(revision 16442)
+++ wp-admin/includes/post.php	(working copy)
@@ -1490,19 +1490,22 @@
 
 	if ( ! empty( $editor_styles ) && is_array( $editor_styles ) ) {
 		$mce_css = array();
-		$style_uri = get_stylesheet_directory_uri();
-		if ( TEMPLATEPATH == STYLESHEETPATH ) {
-			foreach ( $editor_styles as $file )
-				$mce_css[] = "$style_uri/$file";
-		} else {
-			$style_dir    = get_stylesheet_directory();
-			$template_uri = get_template_directory_uri();
-			$template_dir = get_template_directory();
-			foreach ( $editor_styles as $file ) {
-				if ( file_exists( "$style_dir/$file" ) )
+		foreach ( $editor_styles as $file ) {
+			if ( strpos ( $file, 'http://' ) === 0 || strpos ( $file, 'https://' ) === 0 ) {
+				$mce_css[] = $file;
+			} else {
+				$style_uri = get_stylesheet_directory_uri();
+				if ( TEMPLATEPATH == STYLESHEETPATH ) {
 					$mce_css[] = "$style_uri/$file";
-				if ( file_exists( "$template_dir/$file" ) )
-					$mce_css[] = "$template_uri/$file";
+				} else {
+					$style_dir    = get_stylesheet_directory();
+					$template_uri = get_template_directory_uri();
+					$template_dir = get_template_directory();
+					if ( file_exists( "$style_dir/$file" ) )
+						$mce_css[] = "$style_uri/$file";
+					if ( file_exists( "$template_dir/$file" ) )
+						$mce_css[] = "$template_uri/$file";
+				}
 			}
 		}
 		$mce_css = implode( ',', $mce_css );