Rsync was recently upgraded to 2.6.4. Until buildroot is updated,

the RSYNC_SITE variable needs to be changed.

package/rsync/rsync.mk

@@ -5,7 +5,7 @@
 #############################################################
 RSYNC_VER:=2.6.3
 RSYNC_SOURCE:=rsync-$(RSYNC_VER).tar.gz
-RSYNC_SITE:=http://rsync.samba.org/ftp/rsync/
+RSYNC_SITE:=http://rsync.samba.org/ftp/rsync/old-versions
 RSYNC_DIR:=$(BUILD_DIR)/rsync-$(RSYNC_VER)
 RSYNC_CAT:=zcat
 RSYNC_BINARY:=rsync