Index: src/wp-admin/includes/schema.php
===================================================================
--- src/wp-admin/includes/schema.php	(revision 32496)
+++ src/wp-admin/includes/schema.php	(working copy)
@@ -130,7 +130,7 @@
 ) $charset_collate;
 CREATE TABLE $wpdb->options (
   option_id bigint(20) unsigned NOT NULL auto_increment,
-  option_name varchar(64) NOT NULL default '',
+  option_name varchar(255) NOT NULL default '',
   option_value longtext NOT NULL,
   autoload varchar(20) NOT NULL default 'yes',
   PRIMARY KEY  (option_id),
Index: src/wp-admin/includes/upgrade.php
===================================================================
--- src/wp-admin/includes/upgrade.php	(revision 32496)
+++ src/wp-admin/includes/upgrade.php	(working copy)
@@ -1487,6 +1487,11 @@
 			wp_delete_comment( $comment->comment_ID, true );
 		}
 	}
+
+	$wpdb->hide_errors();
+	$wpdb->query( "ALTER TABLE {$wpdb->options} MODIFY option_name VARCHAR(255)" );
+	$wpdb->show_errors();
+
 }
 
 /**