While running my sync script a few times, I got this from one of the servers.

@ERROR: Unknown module 'CentOS-incdvd'
rsync error: error starting client-server protocol (code 5) at main.c(1296) [receiver=2.6.8]

This was the server:

msync-dvd.centos.org: 109.206.161.25 - Fri Jul  8 13:02:47 EDT 2011

msync.CentOS.org rsync service (l5)
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Nick Olsen
Network Operations
(855) FLSPEED  x106