diff -Nur vsftpd-2.0.5/logging.c vsftpd-2.0.5.1/logging.c
--- vsftpd-2.0.5/logging.c	2005-05-25 23:04:17.000000000 +0800
+++ vsftpd-2.0.5.1/logging.c	2007-03-04 13:37:14.000000000 +0800
@@ -154,7 +154,7 @@
       return;
     }
   }
-  str_replace_unprintable(p_str, '?');
+  /*str_replace_unprintable(p_str, '?');*/
   str_append_char(p_str, '\n');
   /* Ignore write failure; maybe the disk filled etc. */
   (void) str_write_loop(p_str, fd);