diff -up php-5.2.17/ext/ftp/ftp.c.bug-60183 php-5.2.17/ext/ftp/ftp.c
--- php-5.2.17/ext/ftp/ftp.c.bug-60183	2012-01-12 12:04:18.000000000 +0700
+++ php-5.2.17/ext/ftp/ftp.c	2012-01-12 12:04:40.000000000 +0700
@@ -1122,6 +1122,9 @@ ftp_putcmd(ftpbuf_t *ftp, const char *cm
 
 	data = ftp->outbuf;
 
+	/* Clear the extra-lines buffer */
+	ftp->extra = NULL;
+
 	if (my_send(ftp, ftp->fd, data, size) != size) {
 		return 0;
 	}