Index: wp-includes/pluggable.php
===================================================================
--- wp-includes/pluggable.php	(revision 19734)
+++ wp-includes/pluggable.php	(working copy)
@@ -254,7 +254,7 @@
 					case 'from':
 						if ( strpos($content, '<' ) !== false ) {
 							// So... making my life hard again?
-							$from_name = substr( $content, 0, strpos( $content, '<' ) - 1 );
+							$from_name = substr( $content, 0, strpos( $content, '<' ) );
 							$from_name = str_replace( '"', '', $from_name );
 							$from_name = trim( $from_name );