Index: src/wp-includes/ms-functions.php
===================================================================
--- src/wp-includes/ms-functions.php	(revision 34157)
+++ src/wp-includes/ms-functions.php	(working copy)
@@ -599,7 +599,6 @@
 	$base = $current_site->path;
 
 	$blog_title = strip_tags( $blog_title );
-	$blog_title = substr( $blog_title, 0, 50 );
 
 	$errors = new WP_Error();
 	$illegal_names = get_site_option( 'illegal_names' );